He's a novelist but, as his short stories don't allow him to live properly, he mostly works for the gutter press. He was in the same college as Kyougokudou and hangs around with him even though they have nothing in common.
Kyougokudou often describes him as a very weak-willed and uncultivated person and likes to make fun of him.
During the war, Sekiguchi fought with Kiba in the same regiment. While the details about this period are unknown, it is implied that Sekiguchi is a deserter who suffers from psychological disorders because of what he saw and did during the war.
He has a wife named Yukie.
Vova
