His theme song says he's "the friendliest ghost you know"
Favorite TV Theme Songs... [DOC] [TLE] November Birthday - 1 by Jose-Ramiro on DeviantArt [PAR] Nov 2, 2014 ... As his theme song says, he's a friendly ghost; the friendliest ghost you know; 
though grown-ups (and most animals) might look at him with fright,... [DOC] [TLE] Lyrics for singles by Television Show Themes - Myths [PAR] Casper, the friendly ghost The friendliest ghost you know Though grown-ups 
might ... so He always says hello (Hello) and he's really glad to meetcha 
Wherever he may ... Roger Ramjet and his Eagles Fighting for our freedom Fly 
through and in ....