He's a black ops government assassin who can transform into a giraffe or a human-giraffe hybrid that is really angular for some reason. He fights using two swords and wind blades shot from his feet, but giraffes have four feet, so he can shoot wind blades from all four limbs. He can also become a cube. And suck in his neck to fire his head forward like a cannon, his nose like a square-shaped cannonball. Or suck in his neck to make his legs longer, like a pasta machine.
Boy can turn into both a straight-up giraffe and a swordfighting giraffe-man hybrid. He's also got pretty giraffe eyelashes even in his human form.
Kaku turns into a giraffe-human by being ordered to eat a devil fruit by his boss, and the first thing this man does is hop on the giraffe propaganda train, no hesitation. His collegues are wolfs and leopards. Does Kaku mope about being a giraffe? No! He literally holds a whole speech explaining why giraffes are both dope, cool and the most lethal animal on the savanna. Then proceeds to unleash the limitless destructive power of the giraffe. Kaku is the no. 1 giraffe character, hands down, no competition, I will die on this hill, give me 1000 dollars.
Giraffe propaganda:
The template. The original. Every contestant has them to thank as the basis for their tall necked perfection and wonder.