Hobbes

'Hobbes', named for philosopher Thomas Hobbes, is the deuteragonist of the comics. He is Calvin's stuffed tiger and best friend, who, from Calvin's perspective, is a live tiger and real as anyone else in the strip. The interplay between the two title characters, and the question of whether Hobbes was real or not (Watterson said yes, but only Calvin can see that he's alive) is what gave the strip its unique personality that remained mostly untouched during its decade-long run. He is a bad speller (spelling his name as "Hobs", great as "grat", and creek as &quot;crk&quot;); however, he might spell his name "Hobs" and creek as "crk" simply to shorten them because his writing is large (this is far less likely with his misspelling of "great", though he might pretend to misspell it to fool around with Calvin.). Hobbes often helps Calvin with his inventions, yet, since they all usually go wrong, Hobbes is usually reluctant to help.

Credits
Calvin and Hobbes wiki.