Xaihi Build Guide

Last Rite Xaihi Perlica Ardelia

Last Rite team that uses Xaihi and Fluorite to apply extra Cryo Inflictions. Avoid using Fluorite Battle Skill as Last Rite wants as many Cryo Inflictions as possible. Ardelia can be replaced with other buffers like Perlica or Gilberta as well.

Yvonne Last Rite Xaihi Fluorite

Yvonne team that focuses on increasing Yvonne’s damage as much as possible. Note: Last Rite helps enable Yvonne, but Yvonne does not enable Last Rite. Xaihi is the main buffer for the team, so focusing her build on Intellect and Ultimate Gain is key.

Best Weapons

• Best-in-Slot: Detonation Unit
• Alt: Chivalric Virtues
• Alt: Dreams of the Starry Beach (F2P)

Detonation Unit is extremely strong for the effects it provides. The Secondary Attribute% multiplies all of Xaihi's Intellect, which is important for the Cryo Amplification of her Ultimate. It also applies DMG Taken% to the enemy, a separate multiplier from DMG% that is rarely available in the game.

Compared to Detonation Unit, Chivalric Virtues is easier to use but lacks Intellect. It still increases your team damage with an ATK% buff, and it's the best alternative in case Detonation Unit is not available.

While Xaihi can't trigger Dreams of the Starry Beach, it provides a lot of Intellect for increased Cryo Amplification. It's the best free option for Xaihi, and there's no reason use any 5-star option, unless... Ardelia is also on the team.

If none of the above options are available, just use any weapon that provides Intellect, such as Oblivion, OBJ Arts Identifier, Stanza of Memorials or Hypernova Auto.

Gear

General Use

• Gear Set: Eternal Xiranite
• Armor: Eternal Xiranite Armor
• Gloves: Eternal Xiranite Gloves T1
• Kit 1: Eternal Xiranite Power Core
• Kit 2: Frontiers Extra O2 Tube

Eternal Xiranite is used for increasing the damage of the team after Xaihi uses her Ultimate (which provides Cryo and Nature Amp). Since we want to optimize the Amp of her Ultimate, this build prioritizes building Intellect and Ultimate Gain Efficiency. The Secondary Attribute from Frontiers Extra O2 Tube multiplies all of Xaihi Intellect, making it an amazing source of Intellect.

Max Intellect

• Gear Set: None
• Armor: Tide Fall Light Armor
• Gloves: Eternal Xiranite Gloves T1
• Kit 1: Frontiers Extra O2 Tube
• Kit 2: Frontiers Extra O2 Tube

Since you can't stack Eternal Xiranite, in cases where someone else is already using it, stacking Intellect and Ultimate Gain Efficiency is the best option for Xaihi. If you need more Ultimate Gain Efficiency, you can replace one of the Frontiers Extra O2 Tube with Redeemer Seal.

Battle Skill = Ultimate > Combo Skill > Basic Attacks

Leveling her Battle Skill and Ultimate increases the Team Utility, so it’s a high priority for Xaihi. Combo and Basics are just for damage, and they are a low priority compared to your DPS’ skills.

• P1 Agile Execution
• P2 Link Aggregation
• P3 Mapping Node
• P4 Grayscale Release
• P5 Controlled Recursion

Xaihi Potentials focuses on increasing the utility that Xaihi provides to your team. Most of them are just numbers, but Potential 3 allows Xaihi to apply Cryo Infliction to multiple enemies when using her Combo Skill.

Keep in mind that vertically investing in Arknights Endfield is not recommended and you should treat these as a bonus damage/utility for your Operator.

Xaihi is really straightforward, use her Battle Skill and let your Controlled Operator hit enemies with their Final Strike. This heals them or, if their HP is already maxed out, apply Arts Amp to them. So ideally you want your Controlled Operator to be someone that deals Arts Damage.

This also activates Xaihi’s Combo Skill, which deals damage and applies Cryo Infliction to enemies. It has a moderate cooldown, so make sure it’s available before hitting enemies with Final Strikes. Also, try to hit enemies that are already under Cryo Inflictions or Solidification to trigger her Combat Talent and increase the Cryo Damage against them.

Use her Ultimate before spending other units’ Cryo and Nature Skills or, if you unlocked her 2nd Combat Talent, to remove Solidification from your allies and avoid unnecessary deaths.

Xaihi will release on January 22nd, 2026 along with the release of Arknights: Endfield.

Xaihi is a Standard Operator, meaning they are permanently available through the gacha system.