Board Thread:Wiki Discussion/@comment-44601210-20191206012456/@comment-35030974-20191221174908

Modernmyrmidon wrote: I think purpose also makes sense. You know what? I think maybe the red soul is more abstract than the other souls. Like, I think maybe it means more than just one thing. Considering there are parts where it implies how Frisk and Chara are 2 sides of the same coin, I think there's a lot more symbolism involved with the red soul. I'm a little fond of the headcanon that SOULs have a good and a bad trait. Someone (not on this website) suggested that the yellow SOUL could either be Justice and Vengeance or Justice and Retribution.. but I think it'd be more fitting if the two traits weren't postive and negative. Polar opposites could work better.

I can't really think of any other traits that go well with Purpose or Fate, since they seem to cover both good and bad sides of the person with the red SOUL. A big thing in Undertale is that every choice you make matters in the end, so maybe the second trait would have something to do with that. Fate and Purpose are almost the same thing, so it'd be weird to stick them in a SOUL together.