This is probably too late since it was August 28, but I still want to do this and post a BUNCH of fan art of him so...
Some Kaichi,
A crossover I found on tumblr,
This tumblr post,
A surprised Toshiki (Kamui is actually being nice to him for once),
Based on the G season style (Kamui angry again),
Cake and a triggered Kamui, and lastly
This.
Ps. It's also my fifteenth birthday today but who cares anyways _(┐「 ε: )_