Shougo Aoe

Reiji and Kiichi's father, and the person responsible for the existence of the Blue Boy. A coldly manipulative and sadistic person, he enjoyed profiting off the misery and ruin of others. He had almost no relationship with either of his sons and only saw value in Reiji, whom he believed could both run the family and carry on the Aoe name. He saw Kiichi as more of something just there and imprisoned him on the family grounds for a few years. Though Shougo ended up leaving everything to Reiji, Reiji only took hold of the businesses and gave the Aoe estate to Kiichi.