|“||I-I'll do my best!||”|
|Nicknames||Gantai (stage name)|
Seichi-kun (by Rias)
Sei-san (by Issei)
Bloody Reaper (shared with Azrael)
|Hair Color||Black (White as Gantai)|
|Eye Color||Brown (Red as Gantai)|
|Equipment||Kiseki no Shinigami|
Mayumi Hakurata (sister)
Seichi is also a Performer at the Entertain Corporation, being one of the few gifted with the power of performa, which allows one to traverse between the human world and the iDOL Sphere. He is known to the public by his stage name, Gantai, and is the partner of the Angel of Death, Azrael, in addition to being the holder of the Sacred Gear, Kiseki no Shinigami.
Seichi is a young boy, being a head shorter than Issei, usually dressed in his school uniform, consisting of a short-sleeved white dress shirt and black slacks, along with a pair of headphones and a bookbag slung over his shoulders.
At Entertian, as Gantai, he has pale white hair and wears a black, worn out shirt and white slacks. along with a black, leather mask with an eyepatch over his right eye, consisting of a fake, lipless mouth, and steel bolts on the neck. His eyes are also crimson red, and are strangely encompassed by a black sclera.
Seichi is a shy, kind, and introverted boy who has trouble making friends. Generally, he tries to get along with everyone at Entertain, but because of his lack of social skills, he usually ends up as a stuttering mess. He doesn't particularly have any negative aspects, but he does not like being considered as the weak link, hence creating his drive for becoming stronger.
At Entertain, as Gantai, he displays a demeanor that lies in total contrast to his usual self. He becomes cold, dark, and utterly loathing of those he considers to be "trash," and would not hesitate to kill them, when given the chance. He shows utterly no mercy to anyone who crosses him. That being said, he has compassion for comrades, and to extent, certain enemies. He also has a strong dislike for Scarlet Fortuna (Rias), who constantly toys around with him.
"Urusai... There's no point listening to a fool." (Seichi's intro line)
"A-ano... I may not be the best, b-but I'll do what I can!" (to Issei)
"D-don't think I'm a child! I'm still a Performer at Entertain!"
- Seichi's appearance is based on Shinji Ikari, the protagonist of the series, Evangelion, while his Performer persona is based on Ken Kaneki, the protagonist of the series, Tokyo Ghoul.