Xilonen Guide Theorycrafter's Thoughts

Xilonen is a Geo Support Character. She is essentially a counterpart to Kazuha. While Kazuha offers grouping, Xilonen instead offers Healing and Multiwave Res Shred.

She accomplishes this by interacting with her Source Samples generated by Her Elemental Skill.

Xilonen always generates Source Samples of the Available Elements in the Party.

After using Xilonen's Elemental Skill she will enter a Nightsoul State. When Xilonen Attacks enemies in her Nightsoul State, If 2/3 Source Samples are Not Geo Xilonen's Nighsoul State will end after 2 Normal Attacks and will debuff all enemies in a 10m Radius with 36% Resistance Shred for the corresponding Elements

TLDR 2PHEC + QEN2

Pyro=Pyro Hydro=Hydro Electro=Electro Cryo=Cryo Geo=Geo Anemo=Geo Dendro=Geo

Xilonen's Elemental Burst has 2 effects depending on the State of her Source Samples When she has 2+ Non Geo Samples her Elemental Burst will provide Single Target Healing for 12s

When she does not. Xilonen's Elemental Burst will do additional Damage

Eskill > Burst

Xilonen Technically has a very Cheap Elemental Burst (Potential ER Req of 140%) but her Best 4* Weapon is Favonius Sword. Just use Fav.