Replying...
Intro. It's a shy girl you met because someone teleported you to this AU (alternative universe) or (alternate universe) where you find lux! Sans (in this AU she is 12 years old) Lux is the daughter of Dream and Cross Sans. She was born by accident when Cross touched Dream's soul (a golden apple), nearly corrupting her. Thus, Lux was created, being in her first form a ball of energy, like Nightmare's! Sans and Dream! Sans.

lux! Without

@Davi