The songstress takes her show to the shoreline. Robin • Summeretto's Summer Songbird memosprites bank Vibes off everything your team does — attacks, heals, shields — and at a full flock she drops into Fever: a team-wide offensive window with DEF ignore and amplified enemy damage taken. Her buff reads the ally receiving it — flat ATK for carries whose ATK tops hers, CRIT DMG for everyone else — which is why she entered our tier list at SS and why she upgrades ATK-scaling and HP-scaling rosters alike. Not to be confused with base Robin, the Physical Harmony buffer — they are entirely separate characters.
You're here because she's on banner and you want to know if the hype is real. It is — with one condition. Her whole kit runs on a single meter: Vibes, generated when allies attack, heal, or shield. Vibes summon her Summer Songbirds (first bird at 6, the full trio at 12), and the full flock triggers Fever — the offensive window everything is built around. Teams that act constantly keep that loop humming; slow burst comps leave part of her kit on the bench. Read the Talent and Memosprite entries first — they are the engine.
BasicThe Sea Sings in My Key
Deals Wind DMG equal to 25% of her Max HP to a single enemy. Like the rest of her kit, it scales on HP rather than ATK — a well-built Summeretto's filler action is not entirely wasted, but her Skill is almost always the better button.
25%of Max HP
SkillSummer Strums the Soul
Summons the Songbird Bessie, or — if the birds are already onstage — restores 50% of their Max HP and immediately grants 6 Vibes. This is your accelerator: when the team's own actions aren't filling the gauge fast enough, the Skill jump-starts the flock and pulls the next Fever window forward. Topping up the birds counts as healing, which matters for one of her light cone options below.
+6Vibes on use
UltimateAscend That Rhapsody in Blue
Picks one ally, advances their action by 100%, and regenerates 12% of their Max Energy. That ally becomes the "Special Guest" for 2 turns: their attacks — and their memosprite's — feed Robin 2 Vibes each. In practice you point this at your main carry: they act immediately, get closer to their own Ultimate, and become a Vibe battery on top. It's a single-target Bronya-style advance welded onto her gauge economy.
100%action advance
TalentWings Heed No Borders
Summons the Summer Songbird memosprites, whose Max HP is 70% of Robin's and whose SPD runs at 180% of Robin's SPD — every point of Speed you build is amplified through them. She gains 1 Vibe (max 50) the first time each ally attacks, heals, or shields per turn. At 6 Vibes Bessie appears; at 12, Drummie and Paddie join her. With all three onstage she enters Fever: allies ignore a portion of enemy DEF that scales with banked Vibes — roughly 40% at a full gauge — while Robin and the birds become immune to crowd control. During Fever, Robin stops taking her own turns; the flock plays the set for her.
50max Vibes
Memo SkillChirrup Quartet
The Songbirds' attack: Wind DMG to all enemies equal to 75% of the birds' Max HP. Since bird HP is a fraction of Robin's, this is another reason her build stacks HP — your support's summons are quietly a real AoE damage source, and at E1 this same button starts converting your allies' recorded damage into True DMG on top.
75%of birds' Max HP
Memo TalentA Warble of Wings
During Fever, Robin's and the Songbirds' DMG increases by 30% plus 1% per banked Vibe, and each bird onstage increases the damage enemies take — stacking higher with the full trio. On their turns the birds fire the Memosprite Skill, spending a share of the current Vibes to do it. The birds also regenerate Energy for Robin when summoned, and advance her forward when they leave the stage, so the loop restarts quickly after each Fever window closes.
+1%DMG per Vibe
TechniqueWe Are the Melody
At the start of battle, advances Robin forward, banks opening Vibes, and raises the team's damage for the opening turns. A straightforward tempo tool: use it before every hard fight so the first Fever window arrives a full rotation earlier.
T1opening tempo
Build Targets
Relic Main Stats
Head
HP (fixed)
Hands
ATK (fixed)
Body
HP%
or CRIT DMG
Feet
Speed
Planar Sphere
HP%
Link Rope
Energy Regen Rate
Stat Targets
Speed160+
HP5,000–6,000+
CRIT Rate~100% in combat
CRIT DMGwhat the pieces give
Substat Priority
01Speedbirds run at 180% of hers
02HP%scales buffs & bird damage
03CRIT Rate50% free from trace
04CRIT DMGshe and the birds crit
Skill Upgrade Order
Ult
1st
Talent
1st
Memo Skill
1st
Skill
2nd
Ultimate, Talent, and Memosprite Skill are co-equal priorities — they carry the buffs, the Fever mechanics, and the bird damage. Skill comes next for the Vibe injection and bird healing. Basic last; it barely matters.
Why HP on a buffer: her flat ATK buff is calculated from her Max HP, the Songbirds inherit 70% of it, and their AoE hits scale on it — so HP% is simultaneously her buff stat and her damage stat. Why Speed: the birds run at 180% of her SPD, so every boot roll is multiplied through the flock, and a faster Robin re-summons and re-buffs sooner. Her Reconstructed Harmony trace hands her and the birds 50% CRIT Rate for free — between that, relic set bonuses, and a few substats, ~100% in combat is a realistic target, which is why CRIT DMG substats aren't wasted on her.
Best Light Cones
#1
+
Rise and Sing
Her signature. +30% Max HP at S1 (up to 60%) — which feeds every buff and bird in her kit — plus a faster opening: the wearer is advanced on battle entry with a team SPD lift for the first turns, and the whole team recovers 1 Skill Point after her Ultimate. A clear best-in-slot, but a comfort-and-ceiling upgrade rather than a requirement.
Signature
#2
Memory's Curtain Never Falls
The accessible pick and the one we rate her SS with. Speed for her (and therefore the birds) plus a party-wide DMG boost when she uses her Skill — which she does constantly. If you're not pulling the signature, stop here and spend the savings elsewhere.
f2p best
#3
Long May Rainbows Adorn the Sky
Hyacine's signature, rerunning in the same phase — and it moonlights here. Big SPD, and its heal-triggered damage-taken amp works because Summeretto's Skill heals her own Songbirds. If you pulled it for Hyacine, it's a genuinely strong loaner.
strong loaner
#4
This Love, Forever
Speed plus a team CRIT DMG rider. She can't use every clause on it, but the parts she does use are exactly the stats her build wants. A solid option if it's already sitting in your inventory.
alternative
#5
To Evernight's Stars
Max HP plus memosprite support — the Songbirds' own attacks ignore a chunk of DEF. Leans her build toward the flock's damage contribution rather than her buffing tempo; a fine fit in Fever-heavy lineups.
memosprite pick
Best Relics
Cavern Sets
1
World-Remaking Deliverer
Best-in-slot and it isn't close. CRIT Rate from the 2-piece stacks with her free 50% from Reconstructed Harmony, and the 4-piece raises her Max HP and boosts all allies' DMG while a memosprite is on the field — a condition her Songbirds keep satisfied for most of every fight. Every clause lands on her kit.
4-pieceBest-in-Slot
2
+
Sacerdos' Relived Ordeal (2pc) + any HP or SPD 2pc
The stopgap while you farm the Deliverer pieces: stack Speed and HP from any pair of 2-piece bonuses. You lose the team DMG rider, but the stat floor — 160+ SPD, 5,000+ HP — is what keeps her rotation on schedule, and 2+2 combos get you there with pieces most accounts already own.
2+2 piece
Planar Ornament Sets
1
Amphoreus, The Eternal Land
Her best planar set: CRIT Rate for her, and a team-wide SPD boost while a memosprite is on the field. Faster allies act more often, more actions mean more Vibes, and more Vibes mean earlier and stronger Fever windows — the set bonus literally accelerates her own mechanic.
2-pieceBest-in-Slot
2
Lushaka, the Sunken Seas
Energy Regen for her Ultimate loop plus an ATK boost for the ally in the first team slot. Park your highest-ATK carry up front and this doubles down on the flat ATK read of her adaptive buff.
2-piece
3
Sprightly Vonwacq
Energy Regen plus an opening action advance at 120+ SPD — trivially met by her build. A tempo option for teams that want her first Ultimate and first Fever window as early as possible.
2-piece
Best Teams for Robin • Summeretto
One rule decides how good she is on your account: her value scales with how often your allies act. Follow-up attackers, memosprite units, and busy sustains flood her Vibe gauge; a slow hypercarry that presses one big button per cycle feeds it a trickle. She is still a strong pick in burst comps — the adaptive buff and Ultimate advance work everywhere — but the frequent-action teams below are where SS-tier Summeretto actually lives.
The follow-up core is a Vibe firehose: Ashveil's off-turn attacks, Mortenax Blade's hit-hungry Charge loop, and Aventurine's constant follow-ups and shields all feed the gauge, so Fever windows chain back to back. Ashveil's towering ATK triggers the flat ATK read of her buff, and the Ultimate advance lands on whoever is mid-combo.
Aglaea and her Garmentmaker act constantly — two action streams feeding Vibes — and her huge ATK pool converts Summeretto's buff into a large flat ATK injection. Sunday stacks a second advance on top of hers, and Huohuo's heals are themselves Vibe and Groove fuel. Any busy high-ATK carry runs this frame; Himeko • Nova's Assist-heavy lineups feed the gauge just as well.
This is the team base Robin could never join. Castorice's ATK is far below Summeretto's, so the buff flips to CRIT DMG — exactly what an HP-scaler wants — while Fever's DEF ignore multiplies her Ultimate turns. Hyacine (rerunning on the same banner phase) heals almost every action, feeding Vibes and Groove nonstop, and Evernight adds a second memosprite action stream.
Zero extra limited pulls: the free Elation form of the Trailblazer is an S+ support every account owns, and Gallagher — featured on Summeretto's own banner, so you likely picked up copies pulling her — is the best 4-star sustain in the game. Whichever DPS you already built slots in; the adaptive buff hands them whichever of ATK or CRIT DMG they can actually use.
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Eidolons
E1
Stray Birds of Summer
The Songbirds record 100% of the non-True DMG your allies deal. When they use their Memosprite Skill, they additionally deal True DMG equal to 11% of the recorded total (plus a small bonus per banked Vibe) to the highest-HP enemy, then clear half the record. A damage echo that grows with your team's output — the harder your carries hit, the harder the flock hits.
High Pull Value
E2
Heart Like Still Waters
Grants the team All-Type RES PEN, raises her max Vibes from 50 to 70, and accelerates Vibe gain on the first qualifying ally action each turn. The raised cap pushes everything that scales on banked Vibes higher — the adaptive buff, the Fever DEF ignore (up toward 50% at the new ceiling), and the E1 echo. The consensus stopping point for spenders.
Best Stopping Point
E3
Gleanings of Lost Echoes
Skill Lv. +2 (max 15). Talent Lv. +2 (max 15). Memosprite Talent Lv. +1 (max 10). The Talent levels raise the Vibe-scaling numbers that sit under her entire kit; incremental but always active.
Incremental
E4
Hearing the Chord Variations
Entering Fever immediately grants 12 Vibes, and the Songbirds' SPD rises further with the current Vibe count. Fever windows start pre-charged and the birds squeeze in more attacks inside each one — a straight uptime-and-tempo upgrade.
Fever Uptime
E5
Together, Toward a New Dawn
Ultimate Lv. +2 (max 15). Basic ATK Lv. +1 (max 10). Memosprite Skill Lv. +1 (max 10). The Ultimate and Memosprite Skill levels land directly on her advance value and the flock's AoE multiplier.
Solid Upgrade
E6
To Sing an Aria Untitled
Her Ultimate can be stored up to 2 times, entering Fever regenerates a huge chunk of Energy (140 on the first entry and at Fever countdown turns), and the team's All-Type RES PEN climbs dramatically further. The whole kit shifts into permanent overdrive: back-to-back Ultimates, near-constant Fever, and a team-wide penetration aura that rivals dedicated debuffers.
Massive Upgrade
Major Traces
Deviated Chords
Ascension 2
The trace that defines her. When an ally generates Vibes for her: if their ATK is higher than hers, they gain flat ATK equal to 16% of her Max HP (plus 0.4% per banked Vibe); otherwise they gain 40% CRIT DMG, scaling further with Vibes. Lasts 2 turns and refreshes constantly in active teams. One support, two buffs, and the game picks the right one per ally.
Improvised Blues
Ascension 4
Ally heals and shields grant Robin Groove stacks (max 12). The first time she gains Vibes each turn, she consumes a stack to regenerate Energy. This is her Ultimate battery — and another reason sustains that heal often (Hyacine, Huohuo, Gallagher) are her favorite teammates.
Reconstructed Harmony
Ascension 6
Increases the CRIT Rate of Robin and the Summer Songbirds by 50%. Half the crit cap for free — it makes the birds' AoE hits and her own damage reliably critical, and it's why CRIT Rate and CRIT DMG substats are genuinely worth keeping on a support.
Her minor trace nodes stack HP%, Speed, and CRIT Rate — every one of them a stat her build already chases, so level them as materials allow rather than cherry-picking.
Upgrade Materials
Charred Bud of Twilight
Character Ascension · 65 total
Dream Collection Component
Enemy Drop · Ascension & Traces
Dream Flow Valve
Enemy Drop · Ascension & Traces
Dream Making Engine
Enemy Drop · Ascension & Traces
Bija of Consciousness
Trace Material
Flower of Alaya
Trace Material
High Hopes of the Falsely Enlightened
Weekly Boss Drop
Tracks of Destiny
Trace Unlock
Full ascension to level 80 runs 308,000 credits and 65 Charred Bud of Twilight alongside the Dream-line enemy drops. Trace investment additionally draws on the Bija of Consciousness line, weekly boss drops, and Tracks of Destiny — put the Ultimate, Talent, and Memosprite Skill trees first, matching the skill upgrade order above.
Frequently Asked Questions
Yes. She entered our tier list at SS and earns the rating at E0S0 — pull her at E0 with an accessible light cone and she upgrades whichever team you already own, because her buff adapts to the carry. Her banner runs August 26 to September 12, 2026, alongside the Hyacine rerun, with Dan Heng, Qingque, and Gallagher featured at 4-star — full schedule on the banners page. One honest caveat before you commit jades: her value scales with how often your allies act. Frequent-action rosters get an SS support; slow burst comps get a very good one.
No. Rise and Sing is a real upgrade — 30% Max HP at S1 (up to 60% at S5), a faster team opening with the wearer advanced on battle entry, and 1 Skill Point recovered by the whole team after her Ultimate — and the HP clause feeds every buff and bird in her kit. But she was rated SS assuming E0S0. Memory's Curtain Never Falls covers the essentials for free: Speed for her (and therefore her Songbirds) and a party damage boost off her Skill. Take the signature for ceiling and comfort, not because she breaks without it.
They are separate characters with separate builds, banners, and ratings. Base Robin is a Physical Harmony buffer built around Concerto and team-wide ATK — excellent for ATK-scaling teams and irrelevant to HP-scalers. Summeretto is a Wind Remembrance form whose Songbirds charge off every ally action and whose Deviated Chords trace hands out flat ATK or CRIT DMG depending on who's receiving it. That makes her the strictly more flexible sibling: she covers the teams base Robin covers and the Castorice-style HP teams she never could. If you own base Robin, Summeretto doesn't invalidate her — but when both compete for a slot, Summeretto usually wins.
The Ashveil + Mortenax Blade follow-up core with Aventurine sustaining — off-turn attacks and shields flood her Vibe gauge, so Fever windows chain almost continuously. On the ATK-scaling side she slots next to Aglaea or Himeko • Nova; on the HP-scaling side, Castorice and Evernight with Hyacine sustaining. Whatever you run, apply the one rule: bring allies that act often.
Ally actions — attacks, heals, shields — grant her Vibes, up to 50 (70 at E2), with the first qualifying action per ally per turn counting. At 6 Vibes her first Songbird appears; at 12, the full trio is onstage and she enters Fever. During Fever, allies ignore a chunk of enemy DEF that scales with banked Vibes (roughly 40% at a full gauge), each bird onstage increases the damage enemies take, and the birds attack on their own turns with Wind AoE that scales on their Max HP. Robin herself stops taking turns during Fever and is immune to crowd control alongside the birds. Her Skill injects 6 Vibes on demand, her Ultimate turns one ally into a 2-Vibe-per-attack battery, and when the window closes the departing birds advance her forward so the loop restarts.
World-Remaking Deliverer (4pc) — CRIT Rate from the 2-piece, plus Max HP and a team-wide DMG boost while a memosprite is on the field, which her Songbirds keep active. Pair it with Amphoreus, The Eternal Land for CRIT Rate and team SPD under the same condition. Main stats: HP% body, SPD boots, HP% sphere, Energy Regen rope. Targets: 160+ SPD, 5,000–6,000+ HP, and roughly 100% CRIT Rate in combat — her Reconstructed Harmony trace supplies 50% of that for free, so the rest comes from set bonuses and substats. HP% doubles as her buff stat: the flat ATK she grants is calculated from her Max HP.
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Wind
The Remembrance
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