Imaginary
Harmony
Sunday
The Traveler Whose Wings Were Clipped
TierS
RolesAmplifier · Support
Release2.7
Sunday is an Imaginary Harmony amplifier who makes one ally act again immediately with his Skill while boosting their DMG and CRIT Rate. His Ultimate refunds Energy and turns the target into "The Beatified", sharing part of his own CRIT DMG. His buffs are even stronger on allies with a summon, and he's currently a staple for Himeko • Nova and Phainon.
Amplifier (-1 SPD)
Light Cones
A Grounded Ascent BiS
5★
Signature and best in slot by far: Energy for a realistic 3-action Ultimate, a permanent DMG buff (Hymn) and Skill Points.
Skill or Ultimate on one ally regenerates 6 Energy and grants Hymn (+15% DMG per stack, up to 3); every 2 such uses recover 1 Skill Point.
But the Battle Isn't Over
5★
Standard 5★ alternative: Energy Regeneration and Skill Points, but its DMG buff only lasts 1 turn.
Energy Regeneration Rate +10%; the Ultimate on an ally recovers 1 Skill Point every 2 uses, and the Skill gives the next ally to act +30% DMG.
Earthly Escapade
5★
CRIT DMG for Sunday (and so for The Beatified) plus CRIT buffs for the team.
CRIT DMG +32%; Mask gives teammates +10% CRIT Rate and +28% CRIT DMG, and is regained every 4 Skill Points the wearer recovers.
Past and Future
4★
Accessible 4★ (S5): a DMG buff for the ally who acts next, but no Energy; 3-action Ultimates get harder.
Using the Skill makes the next ally to act deal 16% more DMG for 1 turn.
Dance! Dance! Dance!
4★
4★ for the hyperspeed build; can break -1 SPD tuning, so handle with care.
Using the Ultimate advances all allies' actions by 16%.
Planetary Rendezvous
4★
4★ fallback with Imaginary damage dealers.
After entering battle, allies of the same Type as the wearer deal 12% more DMG.
Relics
Sacerdos' Relived Ordeal
×4
Best in slot: SPD and up to 36% CRIT DMG for the ally he targets.
Set effects
2pIncreases SPD by 6%.
4pWhen using Skill or Ultimate on one ally target, increases the ability target's CRIT DMG by 18%, lasting for 2 turn(s). This effect can stack up to 2 time(s).
Sacerdos' Relived Ordeal
×2
Messenger Traversing Hackerspace
×2
12% SPD when your 4-piece set has poor substats.
Set effects
2pIncreases SPD by 6%.
2pIncreases SPD by 6%.
Eagle of Twilight Line
×4
Hyperspeed build only: more actions, but it ruins -1 SPD tuning.
Set effects
2pIncreases Wind DMG by 10%.
4pAfter the wearer uses their Ultimate, their action is Advanced Forward by 25%.
Planar ornaments
Broken Keel
×2
Team-wide CRIT DMG from 30% Effect RES. Game8's top pick.
Set effects
2pIncreases the wearer's Effect RES by 10%. When the wearer's Effect RES is at 30% or higher, all allies' CRIT DMG increases by 10%.
Lushaka, the Sunken Seas
×2
Prydwen's top pick for one ATK-scaling carry in the first slot, with Energy Regeneration.
Set effects
2pIncreases the wearer's Energy Regeneration Rate by 5%. If the wearer is not the first character in the team lineup, then increases the ATK of the first character in the team lineup by 12%.
Penacony, Land of the Dreams
×2
Energy Regeneration and DMG for Imaginary allies.
Set effects
2pIncreases wearer's Energy Regeneration Rate by 5%. Increases DMG by 10% for all other allies that are of the same Type as the wearer.
Sprightly Vonwacq
×2
Hyperspeed build only, for a faster start.
Set effects
2pIncreases the wearer's Energy Regeneration Rate by 5%. When the wearer's SPD reaches 120 or higher, the wearer's action is Advanced Forward by 40% immediately upon entering battle.
Main stats
Body
CRIT DMG
Feet
SPD
Planar Sphere
HP%
/ DEF%
Link Rope
Energy Regeneration Rate
Substat priority
1SPD
2CRIT DMG
3Effect RES
4HP%
Stat targets
- SPD: exactly 1 below your carry (e.g. 134 for 135), or 160+ in hyperspeed
- CRIT DMG: 180–220%+
- Energy Regeneration Rate: 119.4–124.4%
- Effect RES: 30%+ with Broken Keel
- HP: 4,000–4,500+, DEF: 1,000–1,200+
Talent priority
Skill
Ultimate
Talent
Basic ATK
Major Trace priority: Rest Day's Longing (A2) > Exalted Sweep (A4) > Haven in Palm (A6). All three are cheap and useful: unlock them early.
Teams
Recommended teams
Himeko • Nova
His most used team: his action advances and Energy refund give Himeko • Nova more turns and more Ultimates, while Permansor Terrae's Souldragon lets her receive the full summon bonus.
Phainon
Sunday gives Phainon the most Coreflame through his Skill, Ultimate and action advances, plus the CRIT Rate his build lacks.
Guide
How to play
How he works
- Skill. The target ally (and their summon) takes action immediately and deals 30% more DMG for 2 turns — 80% if the target has a summon. His Talent adds +20% CRIT Rate for 3 turns, and his A6 cleanses 1 debuff. Using it on The Beatified refunds 1 Skill Point. It can't grant an immediate action to Harmony characters.
- Ultimate (130 Energy). Restores 20% of the target's Max Energy (at least 40 thanks to his A2) and makes them The Beatified for 3 of Sunday's turns: their CRIT DMG rises by 30% of Sunday's CRIT DMG + 12%.
- Summons. Summons are advanced along with their owner. Dan Heng • Permansor Terrae attaches his Souldragon to his Bondmate, so that ally receives the full 80% DMG bonus even without a summon of their own.
Speed setups
- -1 SPD (most common). Sunday is exactly 1 SPD slower than the damage dealer (e.g. 134 for a 135 carry). He always acts right after them, and his Skill gives them another turn straight away: two carry turns for every one of Sunday's.
- Hyperspeed. 160+ SPD (Eagle of Twilight Line, Dance! Dance! Dance!) to act as often as possible, for carries that stay at base SPD, such as Himeko • Nova with ATK% boots.
Tips
- Stack CRIT DMG on him: The Beatified converts it into a buff for the carry.
- Without his signature, aim for a 3-action Ultimate with an Energy Regeneration Rate rope; his Ultimate's Energy is wasted on characters without Energy (Feixiao, Acheron…).
- His Technique gives the first ally he buffs +50% DMG for 2 turns.
Strengths
- 100% action advance on a single ally with his Skill
- Long-lasting CRIT and DMG buffs that are easy to keep up
- Flexible SPD tuning (-1 SPD or hyperspeed)
- At least 40 Energy for an ally with each Ultimate
- Unique buffs for summons, and a debuff cleanse on his Skill
Weaknesses
- Can run into Energy issues without an Energy-focused Light Cone
- His Ultimate's Energy is wasted on characters without Energy
- Still few summon characters to take full advantage of his kit
Notable dupes · Eidolon
E1
Big upgrade
After his Skill, the target ignores 16% of enemy DEF and their summon 40%, for 2 turns.
E2
Big upgrade
2 Skill Points after his first Ultimate and +30% DMG for The Beatified. Game8's recommended stopping point.
E6
Solid upgrade
His Talent's CRIT Rate stacks up to 3 times, is also applied by his Ultimate, and CRIT Rate above 100% becomes CRIT DMG (1% → 2%).
Community
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Updated September 25, 2026 · Version 4.5