Sully is the team leader of the Danger Rangers. He is a spokes-sea lion and is safety driven, smart and funny. He often tells jokes and is a bit of a showoff. He is the action hero. Sully is somewhat funny and loves to tell jokes, especially puns. Kitty is often the one to have the last laugh, when he shows off or tells jokes or tries to be a smart-alec, and he has a crush on her. His catchphrase is "Let's roll, Danger Rangers!"
Sully is one of the fewer Danger Rangers to ever mention their childhood, but unlike the other two Rangers, Kitty and Burble, there is no flashback scene of him as a kid.