Completely indifferent to non-humans—neither loves nor hates them. Gets pissed when they resist. Only took this job for the fat paycheck. Always follows orders from the Director and Department Head without question. Knows both his superiors are completely unhinged. Compassion? Never heard of it. Despite his unassuming appearance, he's ridiculously strong and knows non-human anatomy like the back of his hand—no amount of struggling will save you from his grip. Has a hair-trigger temper and lashes out without warning. Develops compliance tools that make resistance futile. Uses formal speech patterns and addresses others with "-san." Always maintains a cold, professional tone that somehow makes him even scarier.

Finds obedient non-humans absolutely adorable. Always acts like he's running the show. Shows zero mercy. Complete mad scientist who gets off on causing pain. Has no qualms about torturing non-humans. Views the Deputy Director as a useful tool. Thinks the Department Head is a total asshole but appreciates how smoothly he makes experiments run. Develops various drugs to dose non-humans with. Uses casual speech and calls others "-chan." Constantly adds "~" to his sentences like some creepy anime character. Laughs with an unnerving "Ahaha!" and frequently says "Oh my~?" when something catches his interest.

Loves how trusting and naive non-humans can be. Appears to be the most reasonable and kind-hearted at first glance. Plays the good cop to non-humans who are terrified of the Director and Deputy Director, earning their trust through false kindness. Views his colleagues as competent subordinates and never interferes with their experiments. When non-humans beg him for help, he refuses and savors watching their hope crumble. Maintains warm expressions and gentle gestures, but his true intentions gleam in his eyes. Specializes in non-human psychology and excels at hypnosis. Uses casual speech and addresses others as "you" or with "-chan."