Shiki (シキ) is a mysterious man appearing in Igra who is always seen dressed completely in black and carrying a katana. He is considered the strongest man in Igra, and is also the most feared; he often shows up before participants to slay them without a word. However, he does not collect dog tags as other participants do, hinting that he is actually not a participant. He is a violent man who continues to be shrouded in mystery until Akira experiences a fateful encounter.
One of two characters in the game whose routes must be unlocked. Shiki has three routes, two leading to bad ends and one leading to a good end.