Sentinel is a 6-star Mineral Arcanist in Reverse: 1999 who stands out for her HP-based damage and self-sustaining playstyle in the Reverse: 1999 tier list. She’s built to hurt herself slightly while powering up her team through the Bloodtithe system, making her both a fighter and protector in one. If you plan to pull for her or want to have the best Reverse: 1999 Sentinel build, this guide explains everything you need from her skills and ideal setups to the best teams to pair her with.
Know that a right build comes up with the right members and for that, you will need more crystal drops. The most accessible and affordable method to have them at a discounted rate is Enjoygm. So, before starting, don’t forget to top up yourself from there as well.
Reverse: 1999 Sentinel Core Abilities
Sentinel focuses on Reality damage and uses her health to fuel her strength. Her skill set works best when you balance her offense and healing as follows.
- Basic Attack – Atone: This single-target Reality damage skill belongs to the [Plead] type. At max level, it deals up to 300% Reality damage. After using it, Sentinel gains a [New Wound] that turns into a [Fresh Wound] the next round and increases your team’s [Bloodtithe] by one stack. This is important for boosting her and her allies’ overall power.
- Arcane Skill – Expiation: This skill gives Sentinel five stacks of [Spirit Shell], which act as shields. When allies take damage, the stacks bounce to them, helping reduce incoming damage. Any unused stacks turn into healing at the end of the round, based on her maximum HP. At higher levels, each unused stack can heal up to 120% of her HP, keeping her alive even during long fights.
- Ultimate – Last Bullet: Her ultimate hits all enemies at once, dealing up to 400% Reality damage and adding bonus damage equal to 20% of her max HP. If she has [Fresh Wound], it’s consumed to deal extra 200% Reality damage and heal her for half her HP. Use this move when she’s fully stacked with Bloodtithe to maximize the burst damage and healing.
Sentinel’s Inheritance (Insight Upgrades)
Each level of Insight or inheritance improves Sentinel’s support and scaling potential for a better Reverse: 1999 Sentinel build as follows:
- Insight I (Level 30): Adds a passive Crit Rate boost (up to 15%) for all allies when Bloodtithe reaches specific levels.
- Insight II (Level 40): Makes [Spirit Shell] bounce more effectively, cutting team damage taken by 10%.
- Insight III (Max Level): Improves HP scaling and lets [Fresh Wound] increase the damage of her next move by 20%.
Her portraits give even more boosts, like faster Bloodtithe buildup, stronger healing from [Spirit Shell], better HP scaling for her ultimate, higher Crit Damage after using wounds, and stronger Crit Rate support for allies.
How to Build Sentinel?
Sentinel works best with HP and Crit-based equipment to take advantage of her healing and scaling. You can mix healing and offense Psychubes to balance her survivability and burst.
Recommended Resonance focus here is:
- Boost HP to enhance both damage and healing.
- Add some Crit or Reality DMG stats for consistent offense.
Best Reverse: 1999 Sentinel Team Combinations
A good Reverse: 1999 Sentinel build is all about a better team. Sentinel fits perfectly with teams that rely on sustained damage and HP mechanics. Pair her with:
- Healers like Medicine Pocket to manage her self-damage and keep the team healthy.
- Sub-DPS units like Druvis III who can capitalize on Bloodtithe stacks for shared buffs.
- Support units who increase damage output or lower enemy defense to help Sentinel hit harder.
Sentinel Build – Best Psychubes, Stats, and Resonance Setups
To get the most out of a Reverse: 1999 Sentinel build, you should focus on boosting her maximum HP since her attacks and healing scale directly with it. Adding Crit Rate and Crit Damage helps her deal consistent damage while keeping her durable in fights. Let’s go through her best Psychubes, ideal stat setup, and recommended Resonance builds.
Best Psychubes for Sentinel
- Homecoming Lament (6-star, Signature): This is Sentinel’s best Psychube. It increases her HP by 16% and gives up to 32% Crit Damage when she triggers bullets or wounds. It works perfectly with her [Fresh Wound] mechanic, helping her deal huge burst damage.
- Beyond Wonderland (6-star, Alternative): This one is a solid all-round option that boosts HP by 16% and Crit Damage by up to 21%. It’s clean and efficient since none of its bonuses are wasted on effects Sentinel doesn’t use.
- The Fighter’s Best Wishes (6-star, Defensive Option): This gives 16% HP and reduces damage taken by 10% when [Fresh Wound] is active. It’s useful if you want Sentinel to survive longer during long battles, though it’s less offensive than other options.
Note: Avoid 5-star Psychubes because they have lower base stats. Also skip The Third Commitment since it’s better suited for other units like Semmelweis.
Stat Priority
To build Sentinel effectively, focus on HP-based stats first and balance your Crit for reliability as follows.
- Main Stats Order: HP% → Crit Rate → Crit Damage → ATK%
- Sub Stats to Look For: Flat HP, Crit Rate, Reality DMG Bonus
Best Resonance Builds
Resonance builds let you fine-tune Sentinel based on how you want to use her. Since her power depends heavily on her max HP, unlocking and upgrading Resonance patterns will help you tailor her playstyle.
- Aspirational Pattern (Offensive Build): If you want Sentinel to focus on pure damage, go for this setup. Stack HP% as the main stat, with Crit Rate and Crit Damage as secondaries. Reaching Resonance Level 10 boosts her ultimate’s HP scaling by around 30%. It’s ideal for burst teams with strong healers like Rubuska who can keep her HP high.
- Genuinity Pattern (Balanced Build): This setup is great for long fights or high-damage stages. Prioritize HP% and Damage Reduction, with a bit of Crit Rate for balance. It helps her shields last longer and increases the healing she gets from unused [Spirit Shell] stacks by about 20%.
- Delirament Pattern (Support Build): If you’re using Sentinel mainly for her team buffs, this is the way to go. Focus on HP% and Incantation Might. It boosts her Insight I team Crit Rate bonus, though it lowers her personal damage. Use it in teams where she supports other main damage dealers.
Reverse: 1999 Sentinel Team Guide – Best Synergies and Banner Details
Sentinel truly shines in Bloodtithe-based teams, where her wound mechanics help build stacks that boost team-wide damage. Since her skills involve HP drain and healing cycles, she works best as a sub-DPS who supports the main attacker while keeping the team alive with her [Spirit Shells]. Let’s look at the team setups that bring out her full potential.
Best Team Combinations for Sentinel
| Team | Members |
| Core Bloodtithe Team (High-End Setup)This team is built for endgame content like the Hadal Zone, where maximizing Bloodtithe can raise total damage by over 50%. Your basic rotation should go like this: start with Sentinel’s S1 to build stacks, use S2 for team protection, and finish with your team’s ultimates once Bloodtithe peaks. | Nautika (Main DPS): Handles wide-area damage and benefits from high Bloodtithe stacks. |
| Semmelweis (Support): Provides Euphoria buffs that strengthen array potency. | |
| Sentinel (Sub-DPS): Builds stacks with her wounds and shields allies with Spirit Shells. | |
| Rubuska (Healer): Maintains HP levels so the team can keep triggering Bloodtithe safely. | |
| Budget Bloodtithe Team (F2P-Friendly Option)This lineup is best for single-target boss fights where you need consistent sustain. Sentinel’s Spirit Shells help the team stay alive while Pickles boosts Crit synergy for smoother damage cycles. | Pickles: Works as a Crit buffer, replacing Semmelweis. |
| Sentinel: Still serves as the sub-DPS and defensive core. | |
| Druvis III: Provides sustain and useful debuffs. | |
| Medicine Pocket: Acts as a flexible healer. | |
| Mineral-Focused Variant (Afflatus Synergy)This version focuses on Mineral Afflatus bonuses rather than Bloodtithe. It’s a great alternative if you want to experiment with afflatus-based builds, though it’s slightly weaker without full Bloodtithe synergy | Argus: Clears status effects and adds team resilience. |
| Sentinel: Bridges damage and defense through wounds and HP scaling. | |
| Melania: Delivers strong follow-up attacks. | |
| Healer (Any): Keeps HP balanced to enable Sentinel’s healing conversions. |
Tips for Smooth Gameplay
Sentinel’s channeling skill requires good Action Point (AP) management, especially when switching between skills that heal, protect, or deal damage. So you have to pair her with AP generators like Druvis III to keep rotations flowing smoothly. Try practicing in easier stages before diving into advanced zones as this helps you master when to trigger her wounds or Spirit Shell conversions for the best results.
If you want to fine-tune Bloodtithe timing or simulate builds, you can use Enjoygm and recharge Reverse: 1999 there. So it help you to track stack progression and adjust team combinations efficiently.
Sentinel Banner Information
Sentinel arrives globally during Version 3.0 on the limited event banner “A Beating Heart Beneath the Stone,” starting October 30, 2025. She will share her banner with Charon in the “A Long Long Way” event.
- 6-star rate: 1.5%
- Soft pity: Starts building around 70 pulls
- Permanent addition: After Version 3.3
If you’re planning to pull for her, save your Unilogs—Sentinel is a long-term investment for players who love HP-scaling and Bloodtithe teams. Expect to see reruns during major updates or anniversary events.
Conclusion
With the right setup, a Reverse: 1999 Sentinel build can easily become one of your most valuable team members. Experiment with your lineup in Wilderness Mode to find the mix that fits your playstyle best. Keep an eye on upcoming patches too as any buffs or system tweaks could make her even more powerful in the global version.
