Board Thread:General Discussion/@comment-27269365-20160327042218/@comment-28108958-20160401213106

I think they show the bad side of each Soul.

Toriel: Kindness. She's thinking so much on us that she tries to steal our liberty to protect us.

Sans: Justice. He kills us. A lot. Because Justice. Even if we are bad... Killing can't be good.

Papyrus: Perseverance. Even if he tries a lot to be a Royal Guard (and make pasta), he is not trying to do what he should do. Being of the Royal Guard means killing humans that can be innocent, like Frisk.

Undyne: Bravery. If you don't understand it, go back to that bridge.

Alphys: Integrity. The failed test on monsters made her doubt her actions and, for someone with high integrity, it hurts a lot. So she was very unhappy and seemed like she was going to do something really bad at the end of the Neutral Route.

Asgore: Patience: Let us wait the 7th human... While my people suffers underground.

Asriel/Flowey - Chara: Determination. To do bad things.