A classmate of Sakura's, and the Student Council Secretary. For no reason at all he would set up a table in the middle of a hallway and drink some tea. He seems to enjoy bondage, as he constantly carries a book around with the cover having the woman in a kinbaku. He is later to be revealed as a Code: Breaker as well, under the code-name 02 (and with this all the even Code: Breakers have been introduced: 2, 4, and 6). Like Rei he also uses the same Code of Hammurabi, but instead of Evil for Evil he replaces it with "and eternal shackles for the evil." He also doesn't seem to prefer killing his targets, stating that "life is precious." Heike's power is controlling light. His Lost form (the form each Code:Breaker takes when he/she temporarily loses his/her special power due to overuse) has not been revealed, as Heike always wears a full-body metal armor to cover himself when in his Lost form, but others describe it as "something incredible".
In chapter 109, it's revealed that Heike is actually over 100 years old. He was born in the Meiji era and enlisted in the Imperial Army, all the while concealing the fact that he had a special power. At that time, the government was secretly carrying out a project to exploit the powers of power users, who were said to be of great aids to Japan in times of crisis. However, as Imperialism took over, the Imperial Army started a relentless purge of harmful and rebellious power users. It was at that time that Heike met the Code:Emperor, who were using his flames to protect fellow power users. Enchanted by the Emperor's strength, Heike joined him, and with 2 others (making them a group of four), founded Eden, an independent organization with focus on the research of special powers. Heike's shown to have a berserk side, which Yukihina describes as being akin to a mad dog, in contrary to his usual composure and just attitude.