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

Episode 1
Debuts in a match against Okabe Rintarou.

Episode 8
Goes after The Janitor as revenge for killing his daughter and causing his wife to commit suicide. Also finds closure for the death of his close friend Shingo Shoji who died in an accident in the aftermath.