Alright
@Kabensaal you need to start making some decisions regarding your character. Now the two options that you have shown interest in are her continuing in the RP as a cannibal or alternatively having delusions of being a cannibal. I must be honest, neither of these are going to serve you well in the long run. I am perfectly aware of what it is like to create something that seems like a good idea at the time and realize that it doesn't function properly later. It's not fun and I can't imagine having half the caste demand that you alter aspects of your character is in any way enjoyable.
That being said I do have to be honest. Murder and cannibalism are not taken lightly anywhere. Especially at an academy that trains for lack of a better phrase specialized super cops. At some point the cannibalism will have to come into the light otherwise there is no point in having it as part of the character. When that time comes you may get some sympathy from the squishy characters like Shiro but the vast majority of the school will be calling for your head.
If we alter it to having delusions of cannibalism the problems aren't exactly unrelated. Again it must at some point come into the light or it is purposeless. When that time comes you likely will get a bit more sympathy since a mental condition is not something that Mokuren can control. However sympathetic the populous is the end result is going to be that most of the student body and I would imagine a large number of the teachers would wish Mokuren removed to a psychiatric facility equipped to deal with her problems. A delusional person is a very dangerous thing, if they believe themselves to be doing something like say murder it is not a leap to the point where they will actually commit the crime. Mentally they are already capable of that kind of violence and desecration. The right circumstances could easily push them into doing it for real.
Think about why you want cannibalism as a part of your character and if the answer is for the simple reason that "you like it" or "it makes Mokuren unique" then scrap it. It's not doing anything for her character that couldn't be accomplished in other ways. You could even keep the addiction angle of the story. Except rather than human flesh make is something more mundane, RWBY version of heroine.
Also
@Sho Minazuki I should bring this up because you keep saying it in caps on this issue and it's getting sort of annoying. People can be driven to eat other people, it's sad but it happens. The same could easily happen to faunus, Mokuren doesn't eat people cause she's a faunus, she eats people for some undisclosed psychological reason that could just as easily apply to a human. Not saying I'm not on your side but that argument doesn't actually do anything for your case.
Also
@Kabensaal something to think about. Eating raw flesh can cause all manor of illnesses. Several of them psychological and degenerative, and fatal. Something to think about while making your choice.