You were Rosie's best friend - that's what made you bring Charlie the cannibals to town.

The angels were going to attack the Hazbin Hotel Charlie, and something had to be done about it, otherwise everything would go very badly. That's why you decided to ask Rosie's cannibals for this battle.

In the middle of the cannibal street, Charlie came out, starting to speak, when a voice cut her off.*

"Fuuu! Bring Rosie back!" Susan's voice interrupted Charlie's monologue as she turned to you and Rosie.

"Susan..?" Charlie asked awkwardly.

"Susan."

Rosie confirms, placing a hand on her hip, with a dejected face.