Timothy Robbins was the brother of Arizona Robbins.
When Arizona came out to him, Tim asked if that meant she was going to marry a chick. When she said yes, he told her that he was going to dance so hard at her wedding. ("White Wedding")
Timothy, Arizona, and Nick were friends throughout their childhood until Tim's death. ("Let the Bad Times Roll")
He was an Army Ranger. He died during his service because there weren't enough doctors in the field.