i dont have 4 hearts on anyone so i dont think 4 is the max or in game yet, but it could be if you have a character with 4! but the most hearts on a character so far ive had is 3 and its on bernard. everyone else has different amounts like logan has 2 arion has 2 ste has 1 korg has 1 and arion has 2. i dont think anyone has 4 so the max is technically whatever amount you can get until there isnt anything else and it just stops. which is another thing that requires specific asks if you wanna know about a specific character.....
alright real quick um, how? i think i had four at one point but that save got deleted a long ass time ago, is it because you chose him during the werewolf event? or did you choose logan and still get his fourth heart? does it have something to do with your fame? how much you hang out with him? i dont remember how i got it and was kinda curious about that since it was a while ago and someone else asked on how to get his fourth heart and i didnt know/even remember if you could.