User blog comment:Raptor of Love/Bonney is Koala ?!/@comment-3202520-20111219103741

Well Oda does have his specific style so it's common that 2 characters are similar but I don't see bonney being koala really but if she was:

Bonney would have a koala theme and therefore could be sichibukai

She would be a friend of fishmen thus making fishmen island sort of something she would want to protect