Think of it like this: Character A and Character B are a couple. You didn't much care for Character B but you and Character A went on an adventure to save Character B when they got kidnapped by beastmen. The adventure built trust and you saved each other's lives, and Character B considers you a friend now.
A week later, Character B quits. How do you retcon out someone who was a large portion of the impetus of you relationship? What if Character A quits? How do you rationalize your history with Character B?
A week later, Character B quits. How do you retcon out someone who was a large portion of the impetus of you relationship? What if Character A quits? How do you rationalize your history with Character B?