He is the White Wolf.
Game of Thrones Season 6, Episode 10
Were you
inside the WOLF again, little lord?
Game of Thrones Season 3, Episode 2
FLOKI: Fenrir, the giant WOLF,
Vikings Season 1, Episode 9
They call him the Young Wolf.
Game of Thrones Season 2, Episode 5
I didn't see, but they
have my brother's WOLF.
Game of Thrones Season 4, Episode 4