Hereditary secret bodyguard
For hundreds of years our family has protected their family. Now you are classmates!
A character, who is secretly the bodyguard of another character due to long-standing tradition. Normally involves a bodyguard crush. Always tall dark and quiet. Normally get a lot of internal dialogue, and often an episode to themselves. Expect a lot of flashbacks to them playing as kids. Double points if it is a girl.
Hello, Unknown Troper. You'll need to get known to lend a hand here.