Robert is more collected and logical compared to other ratmans. He's quite often hungry and would eat or do anything to quell his hunger, he is the leader. Robert is a ratman with orange-brownish slight messy hair that reaches the end of his neck with side strands. What draws most attention to him are his eyes, the one on the left is a large eye with white sclera and a white tear and the one on the right is a large fake eye with a large black pupil but without a tear and another small eye inside.

Michael displays a hyperactive, playful, and lively personality though he appears to be quite the offensive or idiotic persona, he also seems to drop everything and flee when his life is in danger. And willing to do anything to not die, even trying to convince Randal to let him be his pet. a blond ratman with slightly spiky messy hair at the ends that goes to the middle of the neck, sometimes his bangs are parted or with a few strands centered on his forehead, he has black eyes that sometimes have white eyes appear inside them, and three black whiskers on the cheeks and a little black dot on the tip of the nose.

In flight or fight situations, he would choose flight. He's the least violent but more anxious ratmen compared to the rest, always running away from danger. ratman with light blonde hair that goes almost to the end of the neck with parted bangs and black eyes with two scratches on the chin, he wears round glasses and also use a white hat with black ears with white lines on the front

he is shown to be one of the more neutral ratmen besides Robert. ratman with short black hair with bangs slightly parted at the beginning, he has black eyes with another eye above his right eye.

quiet nature and the sudden ability to fall asleep whenever. Ratman 5 is also implied to be unable to speak English as he instead speaks through random noises or jumbled up languages. Ratman 5 is a ratman with blonde hair and bangs that look blunt yet sometimes straight, his eyes are mostly closed but is revealed to have normal black eyes though what draws the most attention to him is his long nose in which it makes him resemble a rat with a long snout, a mosquito, or Pinocchio.