Telethia

Telethia are an enemy species in Xenoblade Chronicles and Xenoblade Chronicles X.

Xenoblade Chronicles
Pure-blooded High Entia turn into Telethia if they come in contact with high concentrations of ether.

Story
The first Telethia seen is the Sani Telethia where it saves Shulk and the party from Metal Face, before meeting up with its handler, Alvis.

Description
''Said to be Mira's guardian and culler of unclean lifeforms, the Telethia is also known as the "Ruler of Fates." It is rumored to have mind-reading abilities that make it virtually invincible-- a theory strengthened by the fact that is has never been defeated in combat. As if that wasn't enough, the creature's vast wings also have the ability to amplify and manipulate ether in the surrounding atmospheare.''

In other languages
Telesia (XC)