That is, for those who don't know, the comic strip character Calvin, from Bill Watterson's Calvin and Hobbes.
Michael is an illustrator and visual artist. He explains this tattoo:
"I’m a Calvin and Hobbes fanatic since I was a kid. I own every single strip. I actually have two of those omnibus hardcover [volumes] and I had gone on a road trip with my father and my 21-year old cousin. 17 states in three weeks. I‘ve always wanted a Calvin tattoo."
