I Also See Alot Of People Imply That Monster Souls Have Certain Color Around It In Their Fanfics I Think Thats Cool Too - Tumblr Posts

I don't remember the person I saw this from but, I love the idea that monster magic is also tied to human soul traits, example Papyrus is bravery, Sans has patience and justice, Undyne justice, etc etc I just think that would be cool, its probably not an actual thing but its nice to think about