Is Muriel worth building in Star Savior?

Yes. She is an S-tier Sun-element Caster who works as a backline DPS that detonates Ignition stacks and extends enemy debuffs. She is strongest in PvE, and in PvP she slips toward A tier because her debuff-extension toolkit does less against human opponents. For Sun teams and boss content she is a core pick.

What gear should Muriel use?

The Motivator set, with a Speed main stat on the Necklace and an Attack main stat on the Ring. The common set bonus is four-piece Insight plus a two-piece Effect Hit, or four-piece Crit Damage and Effect Hit plus two-piece Effect Hit. Prioritize substats Speed, Crit Rate, Crit Damage, Attack, then Effect Hit.

How does Muriel work with Bunnygirl Charlotte?

Both are Sun-element damage dealers built around Ignition, so they feed the same engine on a Sun team. Muriel's passive gives her bonus crit damage and an Ignition stack after a Sun ally attacks, and her ultimate detonates Ignition for burn and attack down, so she pairs naturally with other Sun carries rather than competing with them.

Star Savior Muriel Build: Gear, Skills, and Teams

Why she is strong

Muriel is an SSR Sun-element Caster who sits in the S tier on most tier lists. She is a backline DPS built around Ignition: she stacks it, gains crit damage from her passive, and then detonates it with her ultimate for burn damage and an attack-down debuff. On top of that she extends the enemy’s existing debuffs, which makes her hit harder against targets that are already getting controlled.

She is at her best in PvE, especially on Sun-element teams and against bosses. In PvP she drops a notch toward A tier, because extending enemy debuffs matters less against a human opponent who is not stacking long debuff chains the way scripted bosses do. So build her as a PvE carry first and treat her arena value as a bonus.

This is the base Muriel, not a limited variant, so any guide describing her should line up with the kit below.

Kit overview

Names follow the most common guide romanization, and your client’s English may read differently, so match by effect if a name looks off:

Passive (Triumphant): raises her Crit Damage, and at max level gives her an Ignition stack with high chance after a Sun ally (other than herself) attacks.
Basic (Divine Flame): a single-target holy attack that grants her one Ignition stack.
Special (Holy Bombardment), 4-turn cooldown (3 at max level): a single-target hit that deals more damage for each debuff on the enemy and extends those debuffs by a turn at high chance.
Ultimate (I’ll Be Good From Now On), 6-turn cooldown (5 at max level): a multi-target divine punishment that inflicts ATK Down and, when her Ignition is maxed, applies Burn for 2 turns.

The loop is straightforward: build Ignition with Divine Flame, use Holy Bombardment on debuffed targets to spike damage and lengthen their debuffs, and fire the ultimate at max Ignition so the Burn lands. On a Sun team her passive keeps Ignition topped up almost for free, since every Sun ally attack can hand her a stack.

Skill leveling order

Spend upgrade materials like this:

Basic (Divine Flame): start at level 3, push to 7. It builds her Ignition every turn.
Special (Holy Bombardment): start at level 3, push to 7. Leveling it drops the cooldown and raises the debuff-extension chance.
Ultimate (I’ll Be Good From Now On): start at level 6, push to 8. Max level cuts its cooldown and pushes the attack-down chance higher.

Gear and stats

Run the Motivator set. Main stats:

Necklace: Speed
Ring: Attack

For the set bonus, any of these work depending on your gear pool:

Four-piece Insight plus two-piece Effect Hit
Four-piece Insight plus two-piece Attack percent and Effect Evade
Four-piece Crit Damage and Effect Hit plus two-piece Effect Hit

Substat priority:

Speed
Critical Rate
Critical Damage
Attack
Effect Hit

Speed gets her more turns and faster Ignition, crit turns her passive crit-damage bonus into real numbers, and a little Effect Hit helps her debuff extension and attack down land. The gear guide covers where these pieces come from.

Arcana cards

For Journey content, the recommended lineup leans Power:

No Pain, No Gain (Power)
Divine Judgement (Power)
The Indomitable Masterpiece (Power, on Hard Journey)
A Knight’s Oath (Health)
The Perfect Bunny Girl (Health, on Normal Journey)
Made by Petra♡ (Focus)

That gives her offense up front while the Health and Focus cards keep her on the field. See the best Arcana guide for slotting details.

Training priority

In the Stalla Archives, train in this order:

Power first
Health
Endurance
Focus

Power makes her detonations hurt, then Health and Endurance keep her alive long enough to cycle her rotation.

Teams

Muriel is a backline DPS who belongs on a Sun-element team. The clean version is a Sun party with a frontline damage tank and a healer, then Muriel and a debuffer like Petra in the back. Her passive feeds off Sun-ally attacks, so the more Sun damage dealers around her, the more Ignition she gets for free.

She pairs especially well with Bunnygirl Charlotte. Both are Sun carries built on Ignition, so they share the same engine instead of fighting over it, and a healer like Asherah keeps the fragile backline standing. If you are building one, the Bunnygirl Charlotte build and the Asherah build round out the Sun core. For frontline and full setups, see the best teams guide.

Build summary

Muriel is a Sun-team DPS who rewards a debuff-heavy approach. Motivator Insight set, Speed and crit with a touch of Effect Hit, level her basic and special so Ignition and debuff extension flow, and run her with other Sun carries plus a healer. She is a PvE standout, slightly weaker in PvP, and one of the easiest S-tier carries to slot into a Sun core.

Patch and accuracy notes

This is written for roughly version 2.2.1, around June 2026. Skill names use the most common community romanization and may read differently in your client, so match abilities by effect, not just by name. Cooldowns, chances, and tier placement shift with balance patches and new releases, so treat the exact figures as a snapshot rather than a fixed truth.