Sentinel
Sentinel is a 6★ Mineral Arcanist in Reverse: 1999. Below are the exact Insight materials needed to ascend them, plus other Mineral Arcanists to build alongside.
Data updated: 2026-07-11
Sentinel — Review & Analysis
Sentinel is a 6★ S-tier Mineral character who plays as a crit buffer and sub-DPS. Her Vigil in the Long Night grants Dread Bullets to the whole team, and while everyone holds bullets the team gains +30% Crit Rate while 80% of overflow Crit Rate is converted into Crit DMG — making her a team-wide crit amplifier. On top of that she deals single-target and AoE Reality DMG and sustains herself through her Ultimate by clearing Fresh Wound.
- Powerful team-wide crit buff: while the team holds Dread Bullets, Crit Rate +30% and overflow Crit Rate is turned into Crit DMG, letting allies overstack crit without wasting it.
- Strong self-sustain: her Ultimate removes all Fresh Wound and restores 5% of lost HP per stack cleared — the more wounds stacked, the more she heals.
- Her Ultimate is AoE, does NOT count toward the team's Incantation acquisition limit, and its Retribution coefficient rises 2% per stack of Fresh Wound.
- Mineral Afflatus counters Beast (+30% DMG against Beast enemies).
- Stack-dependent: she needs enough Fresh Wound, Dread Bullets and Bloodtithe built up to reach full power, so she ramps slowly and is weak in the opening turns.
- Mineral is countered by Star: against Star enemies she takes extra damage and her output value drops noticeably.
Level her Ultimate first — it is both her main AoE damage source and her healing tool — then raise Vigil in the Long Night, since that skill is the engine that grants Dread Bullets and triggers the team crit buff; leave the single-target skill for last. For Psychubes, because her bonus damage scales off Max HP and she wants both crit and staying power, prioritize crit/HP or damage-boosting Psychubes; you don't need a pure healing Psychube since she already sustains herself through her Ultimate.
Overview
Base Stats (max level)
| Base Stats (max level) | Lv.1 | Lv.30 | Insight 1 · Lv.40 | Insight 2 · Lv.50 | Insight 3 · Lv.60 |
|---|---|---|---|---|---|
| HP | 1,700 | 2,581 | 4,326 | 6,450 | 7,588 |
| ATK | 246 | 374 | 626 | 933 | 1,097 |
| Reality DEF | 99 | 150 | 251 | 374 | 439 |
| Mental DEF | 99 | 150 | 251 | 374 | 439 |
| Crit Rate | 10.9% | 10.9% | 12.3% | 13.7% | 15.2% |
| Crit DMG | 146.3% | 146.3% | 148.5% | 150.6% | 152.8% |
Sentinel — Skills & Incantations
Atonement
Incantation “Insight II: 1-target attack. Deals 325% Reality DMG. This attack counts as a 【Retribution】. After attacking, gains 5 stacks of 【Fresh Wound】; gains an extra 【Bloodtithe】 +1 if actively used.”
Vigil in the Long Night
Incantation “Insight II: Self channel. Enters the 【Hour of Repentance】 status and gains 15 stacks of 【Dread Bullet】; additionally gains 2 stacks of 【Locked On】 if not already under 【Hour of Repentance】. Consumes 1 point of Bloodtithe to grant 15 stacks of 【Dread Bullet】 to the adjacent ally in front.”
All Fall Silent Beneath Mercy
Ultimate “Insight II: Mass attack. Deals 300% Reality DMG to all enemies. This attack counts as a 【Retribution】; does not take up the allied Incantation Draw Limit. For every stack of 【Fresh Wound】 owned, 【Retribution】 multiplier +2%. Removes all stacks of 【Fresh Wound】 from self; each stack of 【Fresh Wound】 removed restores (Missing HP x5%) HP.”
Prayer Beneath the Blazing Sun
Incantation “Insight III: The team accumulates 【Bloodtithe】 when losing HP. When an ally has 【Dread Bullet】, they gain Critical Rate +40%. When an ally triggers 【Dread Bullet】, they gain DMG Bonus +(carrier's Max HP x0.3%), with excess Critical Rate converted into 80% Critical DMG.”
Skill Quotes
“All have sinned.”
“All have sinned, and must pay their dues.”
“All have sinned, and must pay their dues—I stand counted among them.”
“I shall stand as watcher.”
“I shall stand as watcher, as sentinel.”
“I shall stand as watcher, as sentinel, as a shield against the dark.”
“All wickedness shall be judged—and none shall go unaccounted.”
Insight Materials
Insight 1
Insight 2
Insight 3
Resonance Materials
All 14 Resonance levels
Recommended Psychubes
Where to Get
Teams with Sentinel
Ezio Auditore leans on Riposte, Corvus stacks Crit with Dynamo, and Sentinel converts Crit hits into Bloodtithe — three different resources feeding off the same Crit-focused rotation. Loggerhead pairs Riposte with Heal to keep the counter-attack loop alive. All four run without any Euphoria.
Teams →
Semmelweis and Getian both drop an Array and tag Moxie — placing them together means their Array effects and Moxie generation overlap on the field instead of competing for the same square. Sentinel and Rubuska both carry Bloodtithe, converting the extra Crit/Heal actions the Array encourages into a shared resource pool.
Teams →
Lopera, Mondlicht and Igor all tap into Bullet together with Crit — combining it across three kits at once outperforms any single carry doing it alone. Sentinel keeps the line-up alive with Shield so that payoff has time to land.
Teams →
Tuesday, Semmelweis and Getian all tap into Array together with Poison — combining it across three kits at once outperforms any single carry doing it alone. Kiperina keeps the line-up alive with Shield so that payoff has time to land.
Teams →Sentinel, Rubuska and Moldir all tap into Bloodtithe together with Crit — combining it across three kits at once outperforms any single carry doing it alone. Kiperina keeps the line-up alive with Shield so that payoff has time to land.
Teams →Nautika and Semmelweis both spend HP as a resource instead of hoarding it — Nautika's Incantations trade her own Current HP for extra Reality DMG, and Semmelweis's Ultimate costs every ally 20% Current HP to drop the 【Blood Domain】 Array. Sentinel and Rubuska both carry the same passive that turns any ally's HP loss into shared 【Bloodtithe】, so every point the front two spend feeds the Bloodtithe that Sentinel cashes in on 【Dread Bullet】 bursts and Rubuska turns back into team healing.
Teams →
