i think his workplace buddy is the bird guy (do you know what species he'd be?)
he's kinda nerdy, and talks to charlie about video games and comics! they get along goodXD

the lizardish (what does he look like to you?) guy is another workplace friend, he's the one who brings the music to work , he plays variety, and requests

squirrel guy is often tired looking, he's the colorist in the 2d animation, and the texture artist for CGI stuff
squirrels are not normally so tiny in this world. this guy is just weird like that

the frog is the daycare keeper, gender unknown, never seems to speak