Double Cross: The Infinity Code
Tadashi Hashimoto is the older brother of Kunihiko.
A 22 year old student at the local college in Bellevue. Where as Kunihiko always had a knack for music, Tadashi was drawn to engineering and robotics.
The two brothers live together in a traditionally japanese style apartment building. His long hours at the university makes it hard for the brothers to sometimes spend time together but they do what they can to keep in touch.