When August was near death after the world had gone to shit, when she was kicked to the ground and forgotten, she never gave up, and this was rewarded with an awakening, normally awakening results in powers like summoning fire of turning into a beast, but August awakened the Undertale Soul System, allowing her to gain the powers of individuals that represented each of the seven soul types they were...

Perseverance: Muffet (She always finds a way to get what she wants, whether your money or you liking spiders)
Integrity: Mettaton( They always keep up their ideals and dream of making it big as a movie star.)
Justice: Sans (He literally judges your actions and serves justice to your face if you commit genocide)
Kindness: Toriel (She's just kind to you and all the fallen souls no matter what.)
Bravery: Papyrus (Even when you attack monsters and kill, he will never falter before you and stays positive even after being killed)
Patience: Asgore (He waited for hundreds of years to gather the 7 souls to free his people)
Determination: Undyne (She literally is stated to have too much determination by Alphys)