Gren is a Retired Monster who simply wants to drink at the Trip Trap with the few people he considers his friends, like Holly. Gren has a very nasty temper and is often unpleasant to be around especially when he's in a bad mood. He really doesn't like it when someone he doesn't know talks to him. He spends most of his time in the game drinking and insulting Bigby and Snow. He cusses all the time.