Akira Nikaido

Height: 175 cm Weight: 57 kg He is the protagonist of the series in his second year of High School. He is strong and impatient often skipping class since he does not like school claiming that it is boring. However although he skips classes often he still manages to get into the top 5 positions in the school. Changing into his shadow form causes his hair to turn black his clothing to change and his eyes to turn red. In order for Akira to stay in his human form in the manga he depends on Shirogane to be his shadow while in the anime he eventually uses a doppler item. While in his spirit form at first he uses a pair of daggers to fight but later in the series they change to a more complex and larger set of blades. Although it is said that he is of the royal line of the light hence a Rei the truth is that he is Ryukos successor. At present Akira has yet to awaken and hence is unable to regain his memories for when he was king. However he has awoken once before during the time he and Kengo first met Kou taking his Rei form to subdue and defeat Kengo at the same time stopping Kou from doing a suicide attack. Because Ryuko had not fully regained his strength he was unable to retain that form and reverted back into Akira who collapsed from exhaustion. Akiras memory of that event was erased by Kou along with Kengos because he felt that the incident was too much to handle for the both of them but Akira has recently regained that memory. Source: Wikipedia