Crackhead

Named Crackhead due to the ground floor's suspicions about the person behind the sudden appearance of 'Crackhead ' on the wall outside the rooms of Tiny Little Baby Feet and Fringe Girl. It was blatently her, for the win.
We don't see her much - some people are not sure if she even lives here, although, word on the street states that a boy left her room about a week ago. Presumably he was not there alone. That would be weird.

Her song is: The Shamen - Ebeneezer Goode