Is she right?
Are tsunderes with just blonde hair, twintails or neither nothing more than a phoney imitation?
I'm fairly certain the vast majority of tsundere's are/were in fact not blond. So obviously she doesn't have enough proper education on the subject to craft a well informed opinion.
or she's just a bitch
I don't know if her brain issues are schizophrenia or magic, but her main personality is literally retarded but jokes around in an attempt to get along with others and her alternate personality is competent and likeable.
They don't need to be tsundere, but science has shown that being both blond and having twintails does increase the likability of the character