Yukihiko​ ​Natsugawara

Yukihiko Natsugawara (夏瓦雪彦, Natsugawara Yukihiko) is the eldest son of Byakuyamaru.

Personality
Yukihiko could be described as someone who expects privilege, though he has a general lack of confidence in his own abilities. He had always assumed himself to be the heir to the Natsugawara Group, despite his family assuring him that he can do whatever he wishes. Yukihiko's expectations for privilege lead him to see Jami as his replacement, someone who will take the family business from him.

History
Upon the arrival of his superior, adopted brother Jami, Yukihiko runs away from home. Prior to running away from home, Yukihiko made off with two, valuable micro-SD cards from his father without knowing what was on them. However, Yukihiko carelessly pronounces that he has two valuable SD cards, catching the attention of various gangs. On the run from them, he opts to hide out in the Sonohara Hall backroom. While hidden, Yukihiko hides the two SD cards in products he finds in the backroom. Those same products are later taken by Kuon and Yahiro.

Seeking a weapon by which to protect himself, Yukihiko selects a mallet. Unbeknownst to him, it's not a simple, ordinary mallet, but a cursed mallet which had been hidden in Sonohara Hall by Kujiragi. Upon taking the mallet into his hands, he feels a rush of confidence as well as a lack of fear. With this, he heads towards a group of Heaven's Slave members before attacking the leader.

Following his attack on the leader, Yukihiko offers to employ the rest of the members, offering them cash in exchange for following him. With the group, he intends to attack Sonohara Hall to regain the SD cards he'd left there.