Mythra

Mythra (Japanese: ヒカリ, Hikari; English dub: /ˈmɪθrə/) is one of the two deuteragonists, alongside Pyra, in Xenoblade Chronicles 2. She is a Special Legendary Blade, she can grant tremendous power to her Driver Rex, and his allies. She uses the power of light. She is one of the two forms of the Aegis and another form that Pyra can assume. After a certain point in the game, Rex can freely switch between them at any time.