Levi Kazama

Kazama Levi, a ninja. She knows everything from assassination techniques to perverted techniques. Levi is one of the Trinity Seven too. She is the only one close friend of Yui Since her has appeared only in dreams.

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 uses Shamanistic magic combined with ninjutsu (ninja skills or techniques). This allows her to manipulate air and create illusions of great complexity. 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. According to Levi herself she is about the third strongest person in the world.

Ninja Arts Shadow Thread Binds
Uses razor sharp threads to surround a target, preventing any movements. If the victim moves even an inch they'll be cut.

Ninja Arts Hidden Fantasy Technique
It is a combination magic of friendship.

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