Rainer

"and a compartment in her chair opens up, and a squirrel skeleton comes out, and does a little, ―Hello my baby, hello my honey, hello my ragtime gal- across the table."

Rainer Michelle is a villain at Hieronymous Wiggenstaff's School for Heroism and Villainy who specializes in necromancy. Described by Travis McElroy in Part One: Orientation as "a smiling, shining young woman with long blonde hair, sitting in a very ornate floating chair." She rides a totally pimped out magical, floating chair on account of a chronic illness that causes it to be difficult for her to walk or stand. The chair has multiple extra features including underglow lights and multiple compartments, one of which includes a squirrel skeleton that Rainer can reanimate to do a (deeply troubling) dance.

She is friends with Buckminster Eden and Leon.

Trivia

 * Named after dear friend of Travis McElroy, Rachel Miner