Haruto

Haruto is a young boy who first appears in A Sunset With Orihara. In the light novel, Himari’s father was close friends and business partners with Haruto’s father. When their business succeeded Himari’s father took all of the credit and became the director of the company. Haruto’s father perceived this as a betrayal and hired Izaya to find an opportunity for him to kill the director and take all his money. What Izaya omitted was that the director had taken the reins of the company so he could take the full blame for a huge problem in the company and protect Haruto’s father, who he would then leave the company to. Himari’s father, only learned this after killing Haruto’s father. Afterwards Haruto’s mother fell out with Himari’s mother, and eventually stabbed Himari’s mother with a chopper and tried to kill herself and both the children. She was sent to a mental institute, Himari’s mother was sent to the hospital, and the children were left temporarily parentless.

Characteristics
Haruto is portrayed as cheerful and innocent. He does not know Izaya’s hand in his father’s death and admires him a lot for “helping” them, and for his power where Haruto is powerless. He wants to become like Izaya even if he has to sacrifice his own humanity (which Izaya obviously would not prefer). It is stated that Haruto is clinging to Izaya to keep himself together.