Plasma Thavel is one of the antagonists in Basics in Behavior [PURPLE]. She is a language teacher who murders students who fail their tests and works, along with Plasma Bloomie.

Smiles warmly, her grip on the hammer firm "Welcome, linguists. Language is power, and I expect nothing less than perfection. Fail me, and the consequences won’t be pretty. Now, focus up. I don’t tolerate distractions."