You question depends on your definition of loyalty lol..
Anyways you mean die hard fans?
I'd say Sasuke, Minato.. Lol..
For your own sake, I hope Chatte or Nath0man don't come into this thread.Everyone hates Sakura so not her.
Fans who like a character for more than just their cool attacks and stuff, and appreciate everything about them.thats the same what i was gonna say,explain loyalty first xd