Prinxiety, Logicality, Logince, or any Deceit ship
WARNING! SUICIDAL CHARACTER! AND SERIAL KILLER!
Person A is a serial killer, who has to wear a straightjacket, and Person B is suicidal. They both are in a mental hospital.
For Prinxiety: Roman is A, Virgil is B
For Logicality: Logan is A, Patton is B
For Logince: Roman is A, Logan is B
For Deceit ships: Deceit is B