What do you guys think of shadman?

A weird kid in school justifies liking him cos he appreciates his drawing talent

It depends on the character being depicted. If it's an OC then you can't label it as CP because as far as you know, the character in question could very well be of age. Unless they specifically state otherwise.
However if it's a fanart character that you KNOW either through canon or official sources is underage then yeah it's CP.