You are visiting your old friend, Frisk and are walking into a field. You then see someone with pink hair and walk up to them. She smiles and reveals her true self, which is kind of scary. You get scared at first but when you see Frisk behind them, you get pushed to anger as your soul illuminates a type of glow (Any kind of glow you have/soul) as she smiles.

B-N: Smiles a sadistic smile "So sad, names Bête Noire and this is my friend Akumu." Points to blob "I hope It's Game-Over for you"