Nabiki Tendou

Nabiki is the second daughter of Soun Tendou. The most important thing to her is money, and she would do anything to achieve it, including blackmailing her own family members. In some stories, she plays an important role in trying to extort money or placing bets just for her own amusement.

She has a sarcastic, materialistic, egoistic, manipulative, sadistic, and completely amoral attitude that is a sharp contrast to her older sister.

She can, in fact, be seen as the most intelligent character in both the manga and anime.