Yuuto Kiba

Kiba Yuto
Kiba Yuto is the 'Knight' Of Rias's group, and apparently has a one-sided rivalry with Issei, due to the fact that Kiba is the girls favorite at the Academy, while they see Issei as a creepy pervert. This leads Issei to see Kiba as a rival, whereas Kiba claims to be Issei's best friend. Later, in episode 5, Issei says he, Kiba and Koneko are family, and as a result acknoledges Kiba as a brother.

History
Kiba has a marked hatred of Holy Sword wielders, Priests and Fallen Angels, due to an event in his past, which led him to becoming Rias's servant.

Powers
He has an ability (As yet unconfirmed as a Sacred Gear) called Devils Blade, which sheathes his sword in a black aura that eats Holy power.

Being a 'Knight' Type Evil Piece, Kiba possess insane speed and is heavily skilled in swordsmanship, he has only been seen to use one sword so far, but is depicted with two on his character sheet.