Ms. Rack (real name unknown) is Val's aunt and a teacher at the school. She's both a possible person to date and an ally of the Protagonist in stopping Drape's plans.
She uses magic to make her unable to feel pain and pleasure.
While possible to date her, it has quite a bit of criteria.
First, you must enslave Val and change her into her Bimbo Personality.
Next, get Val to level 4 and lie to Ms. Rack why Val's acting different.
Talk to Ms. Rack again and she'll have a discussion about Val's strange behavior. Use Flirt on her and choose either option. During that scene, use Boost to complete it and talk to Ms. Rack again.
After the scene, you'll have two options: change Val back to a bimbo and get an ending (Mass Bimbofication) or have Val as normal. Either way, Val has to be level 14.
If you're planning on dating Ms. Rack, tell her that you can't promise you won't abuse your magic. Level Val to 16 and head to your room. A scene occurs then and Ms. Rack will become your lover.