Shampoo

Shampoo is a yandere from the Ranma½ anime, and is the yandere to the titular character, Ranma Saotome. She is also a rival of both Akane Tendo and Ukyo Kuonji.

The kanji in her name are shān "coral" and pú "uncut/unpolished gem". The real pun in Shampoo's name though, is that some of the characters from her village are named after beauty products such as Mousse and Cologne.