Regulus
Who is Regulus?
Regulus is a 6-star Star-afflatus Crit Carry who doubles as a defensive support via her powerful [Dodge] mechanic. Her passive [Restless Heart] grants her +50% Crit Rate when she takes no action for a round, with overflow Crit Rate converting into Crit DMG — making her genuinely AP-generous. Her Ultimate [Sleepless Rave] grants all allies the ability to dodge any non-Ultimate attacks for one round, giving the whole team one of the best defensive tools in the game. Prydwen rates her A+ tier as a Sub Carry, noting her [Restless Heart] is clunky but [Dodge] alone justifies her inclusion.
Kit Summary
Gained if Regulus takes no active action in a round. Grants +50% Critical Rate; excess Crit Rate above cap overflows into Critical DMG. Only needs Insight 1 to activate.
Applied alongside her damage skills, stacking additional Crit buffs on allies.
Deals Reality DMG to all enemies and applies [Riot and Roll] to all allies for 1 round — [Riot and Roll] allows allies to dodge any non-Ultimate attack. One of the best team defensive skills in the game.
She only needs to use her Ultimate every few rounds to cycle [Restless Heart] and [Riot and Roll] — naturally AP-generous and good for AP-greedy carries.
Makes her AFK playstyle even stronger and enables Aurora After Winter psychube for team-wide Crit DMG.
Build Guide
🔮 Best Relic / Echo Set
Resonance: Critical Rate and Critical DMG focus. Her Crit Rate overflow mechanic means hitting the cap and converting to Crit DMG is the goal. Portray: P1 for the early spike.
⚔ Best Light Cone / Weapon
Belt It Out (post-Euphoria BiS for Impromptu teams, prydwen): +2–4% team DMG Bonus per Star ally — synergises with Impromptu's playstyle. Aurora After Winter (post-Euphoria, with Kiperina at max Long Night Talk): Her AFK playstyle makes this psychube excellent for team-wide Critical DMG buffing.
📊 Substats Priority
👥 Best Teams
Impromptu Crit core: Regulus + Aleph + Barcarola + Kiperina — stacks large Crit stats from Barcarola and Kiperina, Aleph's [Interpretation], and Regulus' [Rockin' Spotlight] plus [Dodge] defense. Prydwen describes this as one of the strongest team compositions available.
Generalist Crit: Her [Dodge] Ultimate works in any Crit-oriented team needing defensive support alongside a main carry.
F2P Verdict
Regulus is a limited 6-star Star-afflatus character. Belt It Out and Aurora After Winter are her psychube options from prydwen. She needs only Insight 1 to activate [Restless Heart], keeping early investment requirements low. The main challenge is managing the clunky [Restless Heart] timing to consistently maintain the +50% Crit Rate during AFK rounds.
Frequently Asked Questions
Is Regulus good in Reverse: 1999?
Yes — prydwen rates her A+ tier as Sub Carry. Her [Restless Heart] passive grants +50% Crit Rate on AFK rounds with overflow into Crit DMG, her [Dodge] Ultimate protects the whole team from non-Ultimate attacks for a round, and she provides [Rockin' Spotlight] Crit buffs to allies. She is clunky but offers unique defensive value.
What is the best psychube for Regulus?
Belt It Out in Impromptu teams (post-Euphoria, prydwen) — +2–4% DMG Bonus per Star ally. Aurora After Winter is her best if you have Kiperina running Long Night Talk at max amplification, as her AFK playstyle makes team-wide Crit DMG buffing very consistent.
How does [Restless Heart] work?
Regulus gains [Restless Heart] if she takes no active action in a round (no incantation cast). It grants +50% Crit Rate for the next attack; any Crit Rate above the cap overflows into Crit DMG. She only needs Insight 1 to unlock it — making her AP-generous as a sub-carry alongside AP-hungry main carries.
What does [Sleepless Rave] do?
Her Ultimate deals Reality DMG to all enemies and applies [Riot and Roll] to all allies for 1 round. [Riot and Roll] allows all allies to dodge any non-Ultimate attacks — one of the best team-wide defensive tools in R:1999, particularly valuable for protecting low-HP DPS units.