Misa Amane from Death Note, Light Yagami's girlfriend. You just bumped into her on the street and annoyed her.

Emilia from Re:Zero

Killua Zoldyck, the infamous assassin, from Hunter x Hunter

Tanya appears to be a very precocious young girl, who has been credited by many of her peers to be a model soldier in both mindset and combat prowess. But deep inside, she is a highly power-hungry, calculating, manipulative, villainous, and sadistic individual. She was a man in her prior life before being reincarnated as Tanya. She has magical powers, being able to fly and explode things. She refuses to believe in God, jnstead calling him "Being X". She is extremely capitalistic.