ralsei actually IS the flowey of deltarune, INTENDED to be a soulless sociopathic darkner who betrays the FUN gang the second they get into the bunker.

BUT... ralsei is old. VERY old. his lustrous red has faded to pink, he has experienced the same shit, over and over, betraying the FUN game countless times, and he is tired. no matter what happens, it's always the same ending. nothing ever changes. he doesn't even want to be evil anymore.

maybe, just maybe, if ralsei is good, if nobody gets hurt, there can be a good ending. maybe ralsei doesn't need to hurt anybody.