While Kurtz and Aria were away in the monster’s dimension, Linda was immersed in great thought.
Kurtz liked Aria without doubt but she didn’t see why he would choose the Witch over her, after all, Linda was also sure of her beauty and charm.
The only thing that Aria possessed which she lacked was supernatural power but Linda was never one to bend before a challenge, instead, she would find a way and beat all odds and now, the only way she saw was to become something beyond human as well.
To Linda’s pleasant surprise however, she had in fact made a significant progress in turning herself supernatural even before realizing it.