Celestial Sovereign Asteria Caelestas Light

Max rarity ★6, 3 evolution forms. Skills and Lv99 stats are listed for each form.

Base: Asteria, Radiant Star (★5)

Active skill: Greater Radiant SurgeLight damage 6× (lasts 2 drops) ／ Target: all members who attack with that element ／ Stacking: damage-multiplier effects do not stack. If several are active at once, only the single highest one applies. It multiplies with your leader and sub-leader multipliers
Trigger: Triggers on 4-chain
Cooldown: 18 drops initially, down to 12 drops (Rechargeable)
Leader skill: Prismatic GenesisEach element type in your party adds another 1.4× of damage (on top of the base 1×; reaches up to 8× at 5 types) (only on drops that also reach a 6+ chain) ／ Combining: when the leader and sub-leader share the same effect, their multipliers multiply together. They also multiply with an active skill's damage multiplier (only the single highest one if several are active at once)
Lv99 stats: HP 8105 ATK 864 Heal 436

Active skill: Aegis PrayerCleanse all status + shield next hit ／ Target: shared party HP (effectively whole party) ／ Stacking: protects the whole party's HP. Same-type defenses stack separately. Some defenses only work when the enemy telegraphs an attack
Trigger: Triggers when HP ≤ 60%
Cooldown: 33 drops initially, down to 22 drops (Rechargeable)
Leader skill: Iron AegisCharge-attack damage taken −60% ／ Combining: an always-on effect. Both the leader and sub-leader apply at the same time
Lv99 stats: HP 12968 ATK 1178 Heal 653

Active skill: Apex Radiant SurgeLight damage 10× (lasts 1 drops) ／ Target: all members who attack with that element ／ Stacking: damage-multiplier effects do not stack. If several are active at once, only the single highest one applies. It multiplies with your leader and sub-leader multipliers
Trigger: Triggers on 6-chain
Cooldown: 18 drops initially, down to 12 drops (Rechargeable)
Leader skill: Blessing of AgesStage clear EXP 1.5× ／ Combining: when the leader and sub-leader share the same effect, their multipliers multiply together. They also multiply with an active skill's damage multiplier (only the single highest one if several are active at once)
Lv99 stats: HP 22288 ATK 2154 Heal 1150