Sakaido

The main protagonist of ID:INVADED.

Brilliant Detective
The original "brilliant detective", he traverses the id wells of serial killers in an endless loop to try to uncover the truth behind the murder of Kaeru.

Season 6
An ex-detective who ysed to work for the police, he takes an interest in wrestling as "Sakaido".

Episode 1
Debuts in a match against Okabe Rintarou.

Episode 2
As he awakens without knowing his last name, Shingo reminds Sakaido that they are in a tag team together since 15 minutes ago and they need to head to the ring.

Episode 3
Once again awakens and is reminded by Shingo that they are a tag team, and did great when racing on Mount Myogi. Now they have a championship match up next and he better remember their strategy.

Episode 7
Narihisago and Shingo go looking for "The Janitor".

Episode 8
Narihisago Akihito, working late one night after becoming a wrestler, finds The Janitor attacking his daughter, who brutally murdered her to prove "Cunny isn't real".

His friend Shingo would later go visit Narihisago's house while he went to buy a gift to cheer his wife after the fact, and found her bleeding out in the bathtub. Shingo raced to the hospital, but couldn't make it.

Shingo accompanied Narihisago to avenge both of them, and after Narihisago defeated and fatally shot The Janitor, he told him that he can finally forgive himself, because his accident while rushing to the hospital wasn't his fault, and Shingo vanishes.

Episode 10
During the Resistance Christmas Party, still can't stop thinking about his family and Shingo's sacrifice. When the exits close and the Troubleshooters go on a mad rampage, he, Okabe Rintarou, and No More Vidya end up facing The Split and The 92th Reich. He can't let Shingo's sacrifice go in vain and pushes himself to the limit, being a hair away from victory, but M'Rizen overpowers him and wins the match. They are executed.

Season 0R
Narihisago Akihito is a young detective who works large shifts and despite loving his family, rarely sees them.

Episode 3
One night, horrible scenes flash through his mind, indescribable things are done to his family.

This pushes him to start working out and spending more time with them. However, after months of workout, he still has nothing to show for it.

One day, he meets a powerful looking man. The man offers him a demonstration, and the match is so intense that he comes out of it having got a clue. Narihisago thanks "Kiryu" deeply for this.