Shinji Shiba

Shinji Shiba (新波真次, Shiba Shinji) is the son of Taizen Shiba and participant in the Adult Tomodachi Game. He participates in the All Bet Game, the Friend Murder Game, and The Friendless Game.

Etymology
Shinji means second son. His father changed his name from Shinichi (first son) to Shinji after finding someone more worthy to be his successor.