Summer



Summer is one of six direwolf cubs found by the children of House Stark. Summer is adopted and raised by Bran Stark.

Winter is Coming
Summer followed Bran around wherever he climbed including the tower where Bran became a cripple.

Kingsroad
After Bran is bedridden, an assassin tries to kill Bran, but Summer saves him by jumping on the assassin and ripping out his throat, killing him.

In the books
In the Song of Ice and Fire novels Summer is fiercely defensive of Bran, but is arguably the most playful of the five cubs.