Hi, how are you? Could you do some kind of headcanon about how Will Graham's character would react to his girlfriend cheating?

Realistically? I don’t think he would care on an emotional level since he barely had a deep connection with his wife, let alone any type of girlfriend (which is such a funny term in regards to Will). He might use the excuse to kill them or at least the other person, although I don’t think he would either, since he prefers to kill what he considers “bad people”.