I Don't Owe Any Explanations

The video game "Lost Dimension" features a mechanic in which certain members of your main character Sho's party are a traitor and the Big Bad, The End, forces Sho to "erase" one party member on each floor. If, however, you arrive before the End with all traitors, he tells Sho that he has not a single ally beside him. Everyone then joins The End at his side and when Sho asks what he's hiding from him, he tells him that he owes him no explanations and hopes he wallows in despair as he remains ignorant of the truth. He then has one of the traitors stab Sho to death, declaring only after Sho is dead that he will return to the past to take over Sho's life.

Example of:
No-Nonsense Nemesis