as predicted, part of the dungeon included facing an illusion of what you consider to be your happiest place, and Red's was a vision of owning a ranch some 30 years in the future with a long term partner, party members interfered with the vision because Red was taking too long, so it started to decay. Got knocked down and throttled by said partner, and Red's only response was "I thought you loved me" to which they got a "Who could ever love you?" in return. Then they just had to go about the rest of the dungeon!