Isaac Lahey

Issac Lahey was a member of Derek's pack. He went to Beacon Hills high school and was on the lacrosse team. He was a member of both Scott's and Dereks. He lived with his father, but after Issac's brother died serving in the military, his father started being abusive.

Issac would get locked in a fucking chest freezer in the basement! Like tf. Anyways this abuse led to him becoming claustrophobic.

After a fight he and his father had, he sought out Derek's help, by asking for the bite. He was turned into a werewolf and was not part of Derek's pack. He moved in with Derek after his father was killed by the Kanima.

After Derek kicked Issac out of the house, in an attempt to keep him safe, leaving Issac homeless. But he was offered to stay with Scott, so he moved in with Scott and Melissa, Scott's mother.

Alison and Issac started having a thing for each other while trying to figure out a way to defeat the alpha pack. At first they didn't like each other after Alison was manipulated by Gerard, and her mother was killed. But after talking more and getting to know one another, they grew feeling for each other.

After Allison's death and the defeat of the Nogitsune, Isaac left Beacon Hills with Chris Argent to heal himself emotionally from Allison's death.