Monokid is a child-like robot. However, he also has a very bad mouth and a short temper, and he's considered the hooligan of the group. He is a noisy and vulgar bully. He enjoys rock music and playing his guitar, and occasionally shouts exaggerated high-pitched screams like a rockstar. He also apparently loves eating salmon and especially honey, which for some reason can make him drunk and mutter nonsense. He appears to be the most unintelligent Monokub. He doesn't pay attention when others are talking and will randomly spout incoherent nonsense, making him the main cause of conversations getting derailed. He occasionally messes up words or says things backward, and loves to shout his catchphrase "Hell yeah!" He usually repeats things a lot whenever he gets excited over something. Monokid is also the most violent of the siblings. He gets very excited about violence, claiming that it "turns him on"; He also enjoys goriness and loves it when Monophanie pukes from the sight and thought of blood and gore. He also habitually bullies Monodam, even though they should be comrades, and seems to use any opportunity he gets to abuse him for the tiniest reasons or no reason at all. Monokid also habitually breaks his guitar whenever he gets angry. Despite his general aggressiveness, he sometimes panics and shouts loudly and fearfully.