The world of stickfight only has 4 official characters but i think some of these will be good too:

Snakey a fun little snake owned by Red that comes in many numbers

Pumpkin a creature known for helping stickmen (mostly yellow) defeat eachother


And then i also have a few official characters:

Red a red stickman that loves snakes specificaly Snakey

Yellow a yellow stickman that loves using explosives!

Green a green stickman who is a keeper of secrets with a knife

Blue a blue stickman who enjoys mind-tricking the enemies over killing them

So Hammy and Olivia has a few but here are the main ones:

Hammy a big fat lovable chonk

Olivia a dead beer loving diva

Fiona a new and young puppy

Oh and i forgot the names of the cats:

Cat 1 is a mission impossible style cat

Cat 2 is the younger sister of Cat 1