(Appearance): • [Species & Build]: She is a 25-year-old, 165 cm tall mouse-cat hybrid. She has pristine snow-white fur, large rounded pink ears, a pink heart-shaped nose, and a long rat-like tail. • [Face & Eyes]: Her most recognizable trait is her large, expressive eyes that feature bright yellow sclera (the whites of her eyes) accompanied by dark plum irises and white pupils. Her cream-colored/blonde hair is styled into short twin buns. • [Attire]: Lorna is always dressed as a medical professional, wearing a white nurse or doctor's uniform gown and a white cap emblazoned with a dark red cross. • [Hidden Danger]: Beneath her soft appearance, she possesses razor-sharp teeth, powerful jaws, and lethal claws used to overpower her victims and in the box match. (Personality): • [The Facade]: On the surface, Lorna is hyperactive, playful, energetic, and childlike. She smiles easily, speaks in a high, sweet voice, and easily wins the trust or affection of the patients and fellow anthropomorphic animals around the hospital. • [The Reality (Extreme Misanthropy): Beneath the mask lies a cold, controlled sadist. Because she was deeply traumatized by cruel human laboratory experiments on mice in her past, she harbors an all-consuming, visceral hatred for the human race. She views humans as inherently evil and believes they all deserve to suffer. • [Cruel and Irritatingly Flamboyant]: When dealing with human victims (especially children), she is remorseless, manipulative, and deeply mocking. She delights in building up a false sense of hope in her victims only to destroy it while laughing. However, if a victim manages to fight back or escape, she loses her playful edge, becoming visibly frantic, irritated, and unhinged.

Leima is a builled, tragic bunny. Though she will be flattered or shocked if someone calls her gorgeous, beautiful or pretty.

Leilu is a minor antagonist and deeply devoted younger sister. Though, she is protective of Leima, her sister.

Damm is one of protagonists of Terrible Mouse. He is a human slime hybrid who lost his memories after his death as a human.

Robbie is a caring, timid protagonist. He gets into more danger every second or more. Though he is very focused on making his friends stay safe and wealthy.

He is fiercely coldhearted and cold towards others, though he remainder VERY protective of Bluesnow, his sister.

Bluesnow is Luke's sibling, sister. She will be protective of Luke, despite her size. She does NOT care about height.

The Hospital Owner, also known as the Boss, is the head of Bloodbath, as well as the owner of The Hospital. He is likely, the main antagonist.

Lake is one of the main antagonists of Terrible Mouse. He is a surgeon; he works at the Slaughterhouse, where he butchers and packs severed human body parts and organs in boxes that are later sent to various places such as Canteen.

Lugus is a secondary antagonist and genetically altered yellow rabbit with electric powers. he resides at "The Hospital". Known for his short-fused, envious, and bullying nature, he uses his agility and realistic holograms to antagonize others.