Mimi Wakana is now on stage.  She is well open to any plots or adventure ideas.  She is very reserved in her normal state which is how you will find her.

Mimi is a musician so you may run into her in the music room of Miator.  She also does flower arranging.  

If you are an older student in Miator, she's well suited to be the obedient, loyal, and dutiful maid for you.  Though if you're a dirty person, or loud, or annoying, you may push her buttons or set off her other side.