Summer was adopted as a pup with the rest of his siblings when Eddard Stark and his entourage came upon the pups and their deceased mother. At the request of Jon Snow, the pups were spared and each Stark child adopted one as their own. Bran names his direwolf Summer.
Summer followed Bran around wherever he climbed until one day, while climbing a broken tower, Bran witnesses Cersei having sex with Jaime. When they see the boy, Jaime runs over to Bran and grabs him. He pokes his head out the window and upon seeing there is nobody except Summer, he pushes Bran out the window, leaving him comatose and crippled.
As Bran lies in bed, an assassin tries to kill him, but Summer kills the assassin. The direwolf then climbs onto the bed and lays next to Bran in order to protect him from anyone else who may come to harm his master. Shortly afterwards, Lady is killed at Cersei's demand.
Summer is kept inside the godswood of Winterfell. Bran is experiencing Summer's actions and movements in his dreams. When Theon captures Winterfell, Summer and Shaggydog flee with Osha, Bran, Rickon, and Hodor. Summer and Shaggydog reunite with the boys and their companions after the castle is sacked and put to the torch, and accompany them as they travel north to find sanctuary with Jon.
Summer follows Bran on his journey to the Wall. Bran's group are encountered by Jojen and Meera Reed. When Meera puts a knife to Osha's throat, Summer gets angry but Jojen calms him down. Later, Bran wargs into Summer and sees Jon being accosted by wildlings. Bran proceeds to attack and kill some of the wildlings through Summer, acompanied by Shaggydog, while Bran and his companions hide from them in a nearby mill. After that, Summer is separated from Shaggydog as he accompanies Rickon and Osha to Last Hearth. Around this time, his other brother Grey Wind is slain along with Robb, Catelyn, and Talisa Stark as well as the bulk of their forces at the Red Wedding. Meanwhile, Summer follows Bran to the Wall and beyond. While spending the night at the Nightfort, they are met by Samwell Tarly and Gilly, and the former deduces Bran's identity after seeing Summer and mentions his third brother Ghost. Afterwards, Summer continues following Bran, along with Hodor, Meera and Jojen Reed to the lands beyond the Wall.
Summer is hunting in the Haunted Forest, with Bran having warged into him. Bran is awakened after Summer kills a deer and is about to feast. Minutes later, Summer shows Bran a weirwood tree, where Bran experiences a vision guiding him to the Three-Eyed Raven.
When Bran hears a baby crying, Bran wargs into Summer to have a look. While heading towards the baby, however, he gets distracted by the cry of another direwolf. He goes to have a look and sees that it is his brother Ghost locked up in a cage. Summer runs over to Ghost but falls into a trap. Bran refuses to leave Summer and Ghost behind. Bran and his companions are captured by the mutineers at Craster's Keep attempting to free Summer. They later escape when the keep is raided by loyal members of the Night's Watch led by Jon.
Bran and his companions are attacked by numerous wights outside the weirwood tree of the Three-Eyed Raven. Summer saves Bran from one of the wights that was right on top of him. After the group is saved by a mysterious child, Summer follows Bran into the cave beneath the weirwood tree.
Summer stays with Bran for the duration of his stay in the cave. After Bran gets touched by the Night's King in one of his dreams, wights invade the tree. As the white walkers flood into the cave, Summer and The Children of the Forest protect Meera and Hodor as they help Bran. While Bran is being carried away, Summer stays behind to attack the wights, sacrificing his life in order to save his master.
|Season 1 appearances|
|Winter Is Coming||The Kingsroad||Lord Snow||Cripples, Bastards, and Broken Things||The Wolf and the Lion|
|A Golden Crown||You Win or You Die||The Pointy End||Baelor||Fire and Blood|
|Season 2 appearances|
|The North Remembers||The Night Lands||What Is Dead May Never Die||Garden of Bones||The Ghost of Harrenhal|
|The Old Gods and the New||A Man Without Honor||The Prince of Winterfell||Blackwater||Valar Morghulis|
|Season 3 appearances|
|Valar Dohaeris||Dark Wings, Dark Words||Walk of Punishment||And Now His Watch Is Ended||Kissed by Fire|
|The Climb||The Bear and the Maiden Fair||Second Sons||The Rains of Castamere||Mhysa|
|Season 4 appearances|
|Two Swords||The Lion and the Rose||Breaker of Chains||Oathkeeper||First of His Name|
|The Laws of Gods and Men||Mockingbird||The Mountain and the Viper||The Watchers on the Wall||The Children|
|Season 6 appearances|
|The Red Woman||Home||Oathbreaker||Book of the Stranger||The Door|
|Blood of My Blood||The Broken Man||No One||Battle of the Bastards||The Winds of Winter|
In the books
In the A Song of Ice and Fire novels, Summer is fiercely defensive of Bran, but is arguably the most playful of the six pups. He is colored silver and smoky grey, with yellow eyes. Bran names him after waking up from his coma and later mentions, ".... he was the smartest of the litter".
Summer is still alive by the point the novels reached.
The Stark Direwolves