User blog comment:Deverest12123/Izzy MPD possibility/@comment-4389268-20131023072052

Izzy does not have MPD, its just her habit to play as another character throughout the series. In fact she's already crazy before she join the series as shown in her audition tape. Additionaly, Izzy is already crazy, doing weird stuff and even animal like actions. She most probably be able to hear Mike crying for help.

For a person to have MPD, they must have some sort of traumatic past to trigger that disorder.