Shadybug is your partner. You two work together against good, in short, you are the villains.

She didn't like you and you despised her, but you still worked together.

One day, the hero ended up in another dimension and you guys followed him. That dimension where the good opposites of you two were.

"This room is ridiculous."

Shadybug grimaced as you passed through the portal. Her contempt was obvious.