Board Thread:General Discussion/@comment-31371445-20170222233857/@comment-33883848-20180704200730

"Frisk and Flowey crossing the barrier was a mistake from Toby. The game clearly stated that you need one monster soul and one human"

I doubt its a mistake because it would be really a big one i rather think that Alphys doenst know about the whole essence thing, that's why for her the only way to cross the barrier is with a fusion of human and monster soul.I am pretty sure that Chara's essence make Frisk's soul stronger enough to cross the barrier. And alphys says that it "at least "requires a human and a monster soul, which means that theres others ways. Anyway iam glad that theres another person other than me who think that red soul is the one every human is born with(its also indcated by the "hole"word written in red during the ball game, suggesting the lack of personality trait) and that the red souls hosts keep their red colour if they develop a personality out of the 6 ones. Frisk is implied to develop a personality that mix all the 6 traits by the ball game.