Picture it now: a mouse, but ANIMU.
Logic may dictate to make her a bit odd, but that's a personality trait. She belongs to a species and that needs to be reflected in her behaviour and talents.
Does she prefer different tastes, trust differently, operate in larger social groups? These are the real questions for kemonomimi.
Pose the question for catgirls now. A catgirl if taken this way shouldn't just be a human with ears. She should also be sensitive to physical affection, have violentish tendencies, a near inability to get bored, etc.
In sum, the biologist is the best kemonomimi writer.
But give insight into what your ideal kemonomimi is
