Arknights Endfield Character Spotlight: The Cryo Support Queen, Xaihi

Last Updated on January 21, 2026

In the harsh, unforgiving landscapes of Talos-II, survival often depends not just on how hard you can hit, but on how well you can sustain the assault. While flashy Strikers like Last Rite often steal the glory with big damage numbers, the true MVP of any elemental team is the support that enables them. Enter Xaihi, a 5-Star Operator from the enigmatic Cabal of Tranquility.

Xaihi is not your typical healer. She is a tactical Supporter wielding an Arts Unit, designed specifically to push Cryo teams to their absolute limit. She brings a rare combination of consistent HP recovery, massive Cryo Amplification (Amp), and crowd control utility. For players looking to build the ultimate perma-freeze or burst-ice composition, Xaihi is not just an option—she is a necessity.

In this comprehensive guide, we will dismantle Xaihi’s kit, analyze her unique “Auxiliary Crystal” mechanics, and explain why a specific weapon turns her from a good unit into a god-tier support.

Character Overview: The Architect of Tranquility

Xaihi fits into the Supporter class, but her role is multifaceted. She operates as a hybrid between a healer and a damage buffer. Unlike pure medics who might only restore health, Xaihi rewards aggressive playstyles; her healing is often triggered by combat actions, encouraging you to stay in the fight rather than retreat.

• Rarity: 5-Star
• Class: Supporter
• Element: Cryo
• Weapon Type: Arts Unit
• Faction: Cabal of Tranquility
• Attributes: Will (Main), Intellect (Sub)

Her attribute spread is interesting. Will is her primary stat, which scales her healing output, while Intellect governs her buffing capabilities. Balancing these two stats is key to optimizing her build.

Skills and Abilities Breakdown

Xaihi’s kit revolves around her drone-like summon, the Auxiliary Crystal. Understanding how to manage this crystal is the difference between a team that wipes and a team that never drops below full health.

Basic Attack: Cooldown

Xaihi performs a standard 5-hit combo using her Arts Unit to deal Cryo DMG.

• The Mechanic: When you are manually controlling Xaihi, her Final Strike (the last hit of the combo) deals 15 Stagger.
• Strategic Tip: While Xaihi isn’t a main DPS, weaving in her basic attacks to trigger Stagger on bosses can be surprisingly effective during downtime when your main carry is on cooldown.

Battle Skill: Distributed DoS

This is Xaihi’s signature move and the heart of her utility. She summons the Auxiliary Crystal to orbit the active operator.

• Healing Mechanic: The crystal doesn’t heal passively over time. Instead, it triggers when the controlled operator lands a Final Strike on an enemy. This restores HP based on Xaihi’s Will attribute.
• The “Overheal” Buff: If your operator is already at Max HP when the heal triggers, the crystal doesn’t waste the energy. Instead, it converts that heal into a temporary Arts Amp buff.
• Strategy: This skill rewards skill-based gameplay. You cannot just button mash; you must complete your attack chains to trigger the heals or buffs. This creates a satisfying rhythm where playing well keeps you alive.

Combo Skill: Stress Testing

This skill is your primary offensive tool and serves as a bridge between her healing and her damage dealing.

• Trigger Condition: This combo becomes available immediately after the Auxiliary Crystal has used up its healing charges.
• Effect: Xaihi supercharges the crystal and launches it like a projectile. It deals Cryo DMG and applies Cryo Infliction.
• Chain Lightning Effect: With her Potential 3 (Mapping Node) upgrade, this attack chains to nearby enemies, making it excellent for clearing groups of smaller mobs.

Ultimate Skill: Stack Overflow

Xaihi’s Ultimate is a massive steroid injection for your team’s damage output.

• Effect: It applies a global buff to the entire team, granting both Cryo Amp and Nature Amp.
• Scaling: The potency of this buff scales directly with her Intellect attribute.
• Cleansing Utility: Thanks to her Freeze Protocol talent, this Ultimate also acts as a team-wide cleanse, removing negative status effects like Cryo Infliction or Solidification from your allies. This makes her invaluable in ice-themed dungeons where freezing debuffs are common.

Talents and Potentials: Scaling for Late Game

Xaihi’s passive talents further cement her role as a debuff-punisher.

• Execute Process: This talent modifies her Combo Skill (Stress Testing). If the missile hits an enemy already suffering from Cryo Infliction, they take increased Cryo DMG for 15 seconds. This is a massive debuff that sets up your main DPS (like Last Rite) for a huge nuke.
• Freeze Protocol: As mentioned, this adds a cleanse to her Ultimate. In high-level content, being frozen often leads to a team wipe, so having a reliable dispel on Xaihi is a game-changer.

Key Potentials (Dupes):

• P1 (Agile Execution): Increases the Arts Amp from her crystal by 5%. Great for boosting magic damage dealers.
• P5 (Controlled Recursion): A massive spike for her Ultimate. It increases the Amp effect multiplier to 1.1x, significantly raising the team’s damage ceiling.

Best Gear and Weapon Guide

Xaihi is unique in that she is heavily dependent on one specific weapon to unlock her “True Support” potential.

The Must-Have Weapon: Chivalric Virtues

While Xaihi is decent with standard Arts Units, she becomes S-Tier when equipped with Chivalric Virtues.

• Why is it essential? This weapon likely provides a passive that grants a team-wide Attack (ATK) buff or significantly enhances her healing scaling. Without it, she is a good healer. With it, she is an offensive engine that boosts your team’s raw power while keeping them alive.
• Sub-Stat Focus: Look for stats that boost Will (for healing) and Intellect (for buffs).

Best Gear Sets

Since Xaihi wants to cycle her Ultimate and keep her Crystal active:

• Energy Regen Sets: Prioritize gear that helps her recover Ultimate Energy quickly.
• Support Sets: Sets that provide team buffs upon casting an Ultimate are ideal for her.

Team Synergy: The Cryo Ecosystem

Xaihi is a specialist. While she can function in other teams, she is built to dominate in a Cryo or Cryo/Nature hybrid composition.

The Perfect Teammates:

1. Last Rite (Main DPS): Xaihi applies Cryo Infliction and shreds resistance, allowing Last Rite to detonate those stacks for massive damage. Xaihi’s heals also allow Last Rite to play aggressively with her Greatsword.
2. Yvonne (Sub-DPS): Yvonne attacks fast, which means she can trigger Xaihi’s “Final Strike” healing mechanic frequently. The two form a rapid-fire loop of damage and healing.
3. Gilberta (Nature): Since Xaihi’s Ultimate buffs both Cryo and Nature damage, Gilberta can slot in perfectly to create elemental reactions and benefit from the free damage boost.

Pros:

• Dual Utility: She heals and buffs damage simultaneously.
• Crowd Control: Capable of applying Cryo Infliction efficiently.
• Cleanse: Her Ultimate removes annoying freeze debuffs from the team.
• Skill-Based Healing: Rewards good mechanical play (landing combos) rather than passive waiting.

Cons:

• Niche: She loses significant value outside of Cryo teams.
• Gear Dependent: She struggles to compete with top-tier supports without the Chivalric Virtues weapon.
• Manual Play Required: To maximize her heals, the player needs to consistently land Final Strikes, which can be difficult in chaotic fights.

Conclusion: Is Xaihi Worth Building?

If you are planning to run a Cryo team in Arknights: Endfield, Xaihi is not just “worth” building—she is essential. She consolidates the roles of healer, buffer, and debuffer into a single slot, freeing up room for more damage dealers.

Her playstyle is engaging, requiring you to actively participate in combat to trigger her heals, and the payoff is a squad that feels invincible and hits like a truck. If you are lucky enough to pull her and her signature weapon, you have the foundation for one of the strongest elemental teams in the game.