Robin • Summeretto is a 5-star Wind character on the Remembrance path, and she plays nothing like the original Robin. Instead of a fixed rotation, her entire kit runs on a counter called Vibes that your teammates fill for you. Once it reaches the right thresholds, three memosprites take the field and the team gets a large chunk of DEF ignore for free.
Quick answer: Robin gains 1 Vibe each time an ally attacks, heals, or shields for the first time in any turn; at 6 Vibes she summons Drummie, at 12 she summons Paddie, and with all three Summer Songbirds on the field she enters Fever and deploys a Zone that ignores 15% of enemy DEF plus 0.5% per current Vibe.
Robin • Summeretto: Path, element, and banner window
She arrived in Version 4.5 as a separate playable character rather than a costume, so she has her own banner, her own materials, and her own Eidolon track. Her Character Event Warp is Summer Chorus, and it runs through September 12, 2026 on all servers, with Dan Heng, Qingque, and Gallagher as the featured 4-stars.
| Detail | Value |
|---|---|
| Rarity | 5-star |
| Element / Path | Wind / Remembrance |
| Role | Universal support |
| Base HP / ATK / DEF (Lv. 80) | 1,203 / 601 / 485 |
| Energy cost | 140 |
| Signature Light Cone | Rise and Sing |
| Banner | Summer Chorus (5-star rate 0.6%, 90-pull pity, 50/50) |
How Vibes are generated
Vibes are the resource that gates everything else. Her Talent, Wings Heed No Borders, grants 1 Vibe when an ally target uses an attack, or when they provide healing or a Shield for the first time in any target’s turn. The cap is 50. Her Skill is the only tool that hands her a lump sum on demand.
| Source | Vibes gained |
|---|---|
| Ally attack, or first heal/shield in a turn | 1 |
| Skill (Summer Strums the Soul) | 6 |
| Technique (We Are the Melody) | 6, before combat starts |
| Attacks from the ally marked Special Guest | 2 extra |
The Skill also summons the first Songbird, Bessie. If a Songbird is already out, casting it again instead heals the Songbirds for 100% of their Max HP at Skill level 10 and still gives the 6 Vibes. Note that the Songbirds inherit 70% of Robin’s Max HP and 180% of her SPD, so her own stat sheet directly sets their durability and turn frequency.
Fever state and the DEF-ignore Zone
Bessie arrives from the Skill, Drummie is summoned automatically at 6 Vibes, and Paddie at 12. The moment all three are on the field, Robin cleanses crowd control from herself and the Songbirds, enters Fever, and drops the Zone. Inside it, allies ignore 15% of enemy DEF plus 0.5% per current Vibe, so a stack of 40 Vibes turns that into 35%.
Fever is also when the Songbirds start attacking. A countdown with an initial SPD of 140 appears on the action bar, and when it triggers they use Chirrup Quartet, an AoE hit for 150% of their Max HP. Their presence increases DMG taken by all enemies by 8%, 12%, or 16% depending on how many are out, and they raise Robin’s and their own damage by 60% plus 2% per Vibe.
The catch is that each Songbird turn burns 50% of your current Vibes, with a minimum of 12 deducted. When Vibes hit 0, the Songbirds vanish, Fever ends, and Robin’s action advances by 50%. She does not take her own turns while Fever is active, which is why her uptime depends entirely on how often the rest of the team acts.
Ultimate, Special Guest, and energy flow
Ascend That Rhapsody in Blue costs 140 Energy. It advances one ally’s action by 100%, restores 20% of that ally’s Max Energy at level 10, and tags them with Special Guest for 2 turns. That tag is the reason to save the Ultimate for the ramp rather than firing it on cooldown, since every attack from that ally or their summon feeds 2 Vibes instead of 1.
Her energy economy is mostly self-sustaining. Summoning the Songbirds returns 20 Energy, and Improvised Blues converts heals and shields into Groove stacks that each refund 3 Energy on her first Vibe gain in a turn. Rebuilt Harmony hands her and the Songbirds a flat 50% CRIT Rate, which is why she needs so little CRIT from substats.
Build targets: HP, SPD, and CRIT Rate
Her buffs scale off her own Max HP, not off ATK. Deviated Chords checks each ally against her: if their ATK is higher than hers, they get an ATK buff worth 16% of her Max HP plus 0.4% per Vibe; if it is lower, they get 40% CRIT DMG plus 1.5% per Vibe instead. That branch is what makes her work in both ATK-scaling and HP-scaling teams.
| Stat | Target | Why |
|---|---|---|
| HP | 6,000+ | Sets the ATK buff size and Songbird damage |
| SPD | 160 or higher | Earlier summons and faster Songbird turns |
| CRIT Rate | Near 100% in combat | 50% comes free from Rebuilt Harmony |
Her minor traces add 18% HP, 14 SPD, and 6.7% CRIT Rate on their own, so maxing the trace tree does a lot of the lifting before relics. A practical finished sheet lands around 6,569 HP, 160 SPD, and 42.6% CRIT Rate, which reads low until you add the trace bonus and land just under 93% in combat.
Relics and Light Cones for Robin • Summeretto
World-Remaking Deliverer is the relic set, since it raises Max HP for both her and the memosprites while adding CRIT Rate and a team damage buff. Pair it with Amphoreus, The Eternal Land for CRIT Rate and a team SPD boost. Main stats go HP% body, SPD boots, HP% Planar Sphere, and Energy Regen Link Rope, with HP%, SPD, and CRIT substats behind them.
Rise and Sing is her signature and gives the biggest Max HP boost plus a SPD buff that helps hit breakpoints. If you skip it, Memory’s Curtain Never Falls and The Story’s Next Page are the usual replacements, and Time Waits for No One, Long May Rainbows Adorn the Sky, and To Evernight’s Stars all function. Any high base HP Light Cone will do work here, even off-path ones.
Eidolon breakpoints: E1 and E2
E1, Stray Bird of Summer, records 100% of the non-True damage your allies deal, then has the memosprite skill fire back True DMG equal to 11% of that recorded total plus 0.1% per current Vibe at the highest-HP enemy, clearing half the record afterward. It converts a support into a genuine damage contributor.
E2, A Heart of Still Water, adds 18% All-Type RES PEN for allies, raises her Vibes cap by 20, and grants 2 extra Vibes on the first qualifying ally action each turn. Faster ramp and a higher ceiling both matter because the Zone’s DEF ignore scales per Vibe. E3 through E6 are mostly ability level increases, with E6 doubling the memosprite skill multiplier and pushing her Max Energy to 280.
Where she carries a Remembrance-only Memory of Chaos run
A Remembrance-restricted account makes her ramp obvious. Slotted into a roster alongside Cyrene, Aglaea, Evernight, Castorice, and Hyacine, she works even on a budget setup running The Story’s Next Page at S5 rather than her signature, because the Vibes engine only cares that allies keep acting.
Stormcleanse stages 10 and 11 fall comfortably to two Remembrance teams with her buffs applied, both taken to a 3-star clear. The DEF ignore and the enemy vulnerability from the Songbirds cover the damage gap that a path-locked roster normally has.
Stage 12 is where the wall is. Against a boss built with extremely high DEF, Alloy Mechatron: King Pom-Pom, even a fully stacked Zone is not enough on its own, and the second wave runs past the cycle limit. That is the honest limit of DEF ignore as a stat: it shrinks the defense multiplier, it does not replace raw damage from the team.
The practical takeaway is that Robin • Summeretto rewards teams that act often. Follow-up attackers, summons, healers, and shielders all feed her counter, and the faster the Songbirds assemble, the longer the Zone stays up. In a slower comp she still functions, she just spends more of the fight ramping toward the state where her numbers matter.
