Mimi

From Mariopedia

Mimi is one of Count Bleck's lackeys.She looks like an innocent girl,but has a dangerous temper.She is able to shape-shift which she uses to trick Mario and co. into believing she was Merlee and other characters.According to rumors she is some kind of pixl or even the first pixl ever born a.k.a the Pixl Queen which is highly unlikely since Mimi is childish and playful while the Pixl Queen is mutinous and manipulative.When Count Bleck decides to become good in order to help defeat Dimento Mimi and O'Chunks do the the same showing that they are not really that evil and that they care about the Count.After the events of Super Paper Mario she becomes the real Merlee's maid.