Also I do believe I found a feat for Begining of series Issei (And kiba) to scale to at least when he promotes to knight or queen because
"Kiba, who was near me, sprints ahead as soon as Buchou gives him an order. Fast. He's insanely fast. I can't even respond to it!
"Ise, I will continue from the lecture before."
Buchou says.
Lecture? The thing about Evil Piece's traits or something?
"Yuuto's position is [Knight]. Its trait is speed. Those who become a [Knight] have their speed increased."
Just like Buchou said, Kiba's speed increases, and eventually I wasn't able to follow his movements with my eyes.
The monster is using its spear to attack, but it didn't seem like it will hit.
"And Yuuto's ultimate weapon is swords."
Kiba stops and suddenly he is holding onto a European sword. He took it out of the scabbard, and the drawn sword is reflecting the light of the moon.
SU!
Kiba suddenly disappears again. Next moment, the scream of the monster echoes.
"Gyaaaaaaaaaaaaaaah!"
When I looked, both of its arms are cut from its torso along with the spear. Blood gushes out of its wound.
"This is Yuuto's power. Speed that you can't follow with your eyes, and sword skills of a professional. By combining these two, he becomes the fastest Knight"
Kiba is able to move Faster then issei can see At knight ... Remember that at this point issei is a devil who has enhanced senses faster then light Kiba obviously
Later on Issei is able to fight freed Who clashes with Kiba quite a few times and reacts to him