Levi Kazama

Kazama Levi, a ninja. See knows everything from assassination techniques to perverted techniques.

Personality
Levi does not have any expectations, so she always end up expecting something from someone else. Levi won't become envious of anyone, and her strong point is acting independently without having any expectations of others, which is why she's a ninja.

Abilities
Levi's skills are the best in the school and you could say the world. As far as combat abilities goes, she's probably within the top five. Endurance is one of her strong points.

Yui
Levi and Yui are close because they are alike, she doesn't put "expectations," on anyone else, and Yui doesn't develop "friendship" with anyone else