Continuing with my cast images for the comic's website, this is Yuuichi. I've been trying to put all the characters into a pose that shows who they are as people. Yomiko was summoning, Alfred was aiming his gun...
Yuuichi is a swordsman. He's a kid who was taught his skills by his grandfather, whom he lived with for awhile when his delinquent parents were too busy being selfish to deal with him. It didn't last long, and Yuuichi had had to return to his parents in a suburb of Tokyo. His grandfather passed away a short time later.
Yuuichi proceeded to rebel. He was kind of a hooligan for a long time, heading up a gang of other boys and bullying the neighborhood until he was found by a GOAST and brought to the school, where he turned his life around.
The katana he wields was his Grandfather's, and his Great-Grandfather's before that, and is his most prized possession.
If you're keeping track of power-type arm striping, Yuuichi's is red, which means he's a physical-type wielder. The only other physical-type is Sakura. She'll be coming soon!