|Relatives||Ryan Wayfair (deceased)|
Deceased (Light novel)
|Light Novel||Light Novel - Volume 3|
|Japanese Voice||Takahiro Sakurai|
|English Voice||Zach Bolton|
K possesses short, spiky blond hair and sharp blue eyes, as well has a medium built body figure. He is also seen wearing a Unit costume at all times.
K is quite a calm and easy-going individual. He tends to keep up a confident demeanor around others, especially when confronting enemies on his missions. Beneath his calm demeanor, however, is a sadistic, vicious, and conniving person who is willing to do whatever it takes to achieve victory. He goes as far as to injure one of his rivals for his advantages and kill his own men when he sees fit. He also tends to play mind games with his enemies in order to weaken their resolves in a battle against him. As a power hungry person he is, K despises friendship as he believed them as weak, especially one's inability to protect another from danger.
Little is known about Kevin Wayfair before he came into the service of Equipment Smith. From a file produced by Sakuya Tsukumo, Kevin was born in America and had an elder brother named Ryan Wayfair, whom he was very close to. When he was young, his brother was killed by an unknown assailant. The incident traumatized Kevin and he was left by himself. He was later found by Equipment Smith who took him in.
- Tooru and K shares a similarities with each other as both lost their respective siblings in the past prior to the series and desire to seek power.
- However, the major difference between the two is that while K despises friendship and being power-hungry, Tooru is a kind hearted-guy who protect his friends and cherish friendship.