Introducing Fatutu, the newest 6-star Arcanist featured in the version 2.4 update of Reverse 1999. This remarkable healer utilizes the Mineral Afflatus and specializes in delivering Mental damage through her abilities. Among her distinguishing features is the unique Spirit Shells effect, which significantly amplifies the damage enemies receive and raises the critical damage they sustain from subsequent actions. Notably, when Fatutu retrieves shells, she not only heals her allies but also evenly distributes damage across her team.
This guide offers comprehensive insights into optimizing Fatutu’s build in Reverse 1999, covering her skills, recommended Psychubes, team combinations, and essential Insight materials.
Fatutu’s Skills Overview
For detailed visuals on Fatutu’s skills, check out this video guide.
Skill Breakdown
- Unmendable Cracks (Basic Skill 1): This debuff-focused skill inflicts 120%/1800%/300% damage to a single target while applying three Spirit Shells. It also dispels negative effects such as Stat Down, Neg Status, and Control from all allies.
- Ocean in the Shell (Basic Skill 2): Acting as a buff, this skill provides five stacks of the Shared Shells, Shared Fate effect to all allies. Additionally, it allows Fatutu to retrieve all Spirit Shells and equitably redistribute HP among team members.
- Proverb of the Sea (Ultimate Skill): Fatutu unleashes 700% damage on a single foe and applies Spirit Shells, inflicting the Shell Beacon effect for two turns.
Status Effects Explained
- Spirit Shell: Each time the team is attacked or incurs distributed damage, a stack of Spirit Shell is applied to the enemy.
- Shared Shells, Shared Fate: When targeted, damage suffered by the character is distributed evenly among all allies (up to 30 stacks; one stack is used per trigger).
- Shell Beacon: When Fatutu retrieves Spirit Shells, she inflicts the same number of shells on the enemy.
Optimal Psychubes for Fatutu

For an effective Fatutu build, consider the following Psychubes:
- Cracks in the Shell (6-star): This enhances her healing by 8% after casting an extra action (up to three stacks). Upon being attacked or suffering distributed damage, allies’ critical damage increases by 2.4% for three rounds (up to 12 stacks).
- That Inquisitive Dear (6-star): This Psychube enables her to restore an ally’s health (equal to 48% of her attack) for the ally with the lowest HP while casting a basic Incantation debuff (triggers once per account).
- Beyond Wonderland (6-star): Increases her healing rate by 3% after using a debuff-type skill (up to four stacks) while also boosting her critical rate by 12%.
Required Insight Materials for Fatutu

Fatutu possesses a passive ability, termed Seashell Necklace, which provides her with Spirit Shells, heals allies, and applies effects to enemies. Here’s a look at the details across different Insight levels along with the required materials for upgrades:
Insight Levels and Requirements
Insight I
Fatutu gains eight Spirit Shells upon battle initiation, with a 20% chance to gain Moxie while applying Spirit Shells. Allies receive health equal to 30% of her attack multiplied by the number of retrieved Spirit Shells. If an enemy with Spirit Shells is defeated, she retrieves all.
Materials Required:
- Sharpodonty ✕ 18,000
- Page of Mineral Wealth ✕ 6
- Spell of Banishing ✕ 6
- Cicada Wings ✕ 6
Insight II
Entering battle grants her a 5% attack boost.
Materials Required:
- Sharpodonty ✕ 40,000
- Scroll of Mineral Wealth ✕ 10
- Fox Tail ✕ 5
- Bifurcated Skeleton ✕ 6
Insight III
Upon entering battle, she gains an additional four Spirit Shells and subsequently casts a one-star Unmendable Cracks on the enemy possessing the most Spirit Shells after applying or retrieving seven.
Materials Required:
- Sharpodonty ✕ 200,000
- Tome of Mineral Wealth ✕ 6
- Silver Bullet ✕ 6
- Rheingold ✕ 3
Smart Team Compositions for Using Fatutu

In Reverse 1999, Fatutu can serve as an exceptional healer within Timekeeper teams. Her ability pairs well with characters that have extra action mechanics, such as 37 of Star Afflatus and Jiu Niangzi of Mineral Afflatus. Here are some of the top team compositions you can create with Fatutu:
- Semmelweis: The distribution of HP among allies lowers Semmelweis’s health, boosting her damage output.
- Kakania: Kakania’s passive Genesis damage can activate when Fatutu retrieves Spirit Shells.
- Flutterpage: Fatutu can extend the duration of Flutterpage’s Forcefield.
- Barcarola: Barcarola’s Impromptu Incantation counts as an extra action, triggering either a healing or damage buff.
- Voyager: Optimal use of Voyager works seamlessly with Barcarola for heightened effects.
This concludes our detailed guide on constructing an effective Fatutu build in Reverse 1999. Harness her unique abilities and put together a formidable team for victorious gameplay!