|Dub Name||Devin Aeron|
|Game Debut||Danball Senki (PSP)|
|Anime Debut||Episode 01|
|Appears in||Game, Anime|
|Voice Actor||Takanori Hoshino|
|Relatives|| Keiko Yagami (deceased wife)|
Yuki Yagami (deceased daughter)
|Occupation|| Policeman (former) |
Black Unit Commander (defected)
Prime Minister's Personal Intelligence
|Affiliation(s)|| Innovator (defected)|
Eiji has amber eyes and long, auburn hair. He has a commanding stature, and he is always seen wearing formal business attire with a red tie and a cape. Before his wife and daughter passed away, he had shorter hair.
BackgroundOnce a happy working police officer with a wife and daughter, Eiji Yagami's life changed when his family died in the Tokio Bridge Collapse Incident. Very upset and confused by the event, he was approached by Yoshimitsu Kaidou who was visiting the deceased victims' families. Seeing usefulness within him, Kaidou offers him a job under the false pretenses of helping to prevent such an event from ever occuring again.
Later on, however, Eiji learns of Yoshimitsu's true objectives, so he decides to defect and join the Seeker 's cause to foil Yoshimitsu Kaidou's plans and to gain redemption.
During his final day at the Innovator base, he is immediately targeted by security after "Kaidou' and Sadamatsu agree that his information gathering equals betraying the Innovators.
After the events with the Innovator incident, he turns himself in only to be scouted by Prime Minister Sousuke Zaizen to be his personal intelligence as a plea-bargain for his investigation skills.