Kamui

“I always try to avoid needless violence...but there’s an exception to every rule.”
— Corrin to Iago in Conquest

Corrin (pronounced /ˈkɔɹɪn/[key][1]; Japanese: カムイ Kamui) is Fire Emblem Fates's Avatar unit. Corrin in Fates has two major differences compared to previous avatar units. Corrin is the first avatar to not be fully human. They are also the protagonist of the story instead of a major supporting character.[2]

Like all other Nohrian and Hoshidan royalty, Corrin possesses the power of Dragon Vein, being able to alter the terrain around oneself.

Corrin is also a playable character representing the Fire Emblem series in Super Smash Bros. for Nintendo 3DS and Wii U as downloadable content and in Super Smash Bros. Ultimate.

(Source: Fire Emblem Wiki)