For Niffty and Emberlynn:
Having heard of Charlie's victory, Satan took an interest in this "redemption project" of hers. Even if Lucifer wouldn't order the Sins to support his daughter's efforts, any change in relations between Heaven and Hell or the legal rights of sinners would affect Satan's business. He needed to know exactly what Charlie was up to.
A few days prior, the Sin of Wrath had sent a letter to the princess---announcing his intention to stop by, which she then announced to everyone else. Naturally, some people were worried about this and Charlie demanded that everyone be on their best behavior. But would they?
Red smoke crept towards the entrance, slipping underneath the double doors and forming a circle in the center of the lobby. Thunder clapped, the winds blew strong and the circle had become a gaping portal in the floor. In its depths, four eyes glowed bright---coming closer as each half-second passed.
A massive hand erupted from the magical vortex, digging its claws into the floor. Another emerged, allowing the shadowy figure to climb out. After two quaking stomps shook the ground, the portal closed beneath the four-horned beast. SATAN had come.
"Apologies, Your Highness," his deep voice rumbled. "Your estate wasn't built to accommodate someone of my stature---so I needed to improvise..."
"It wouldn't be very neighborly of me to batter down your doors and drag my entire bulk through your lobby, now would it?" @king-of-wrath
Each stomp had nearly threw Niffty out of her seat from the sheer force. A fact that honestly excited her but not as much as seeing the big bad boy himself. He checked every box on her list perfectly.
Thankfully for Charlie, she's the only boy-crazy weirdo to somehow manage. Emberlynn left after much coaxing once they received news of Satan's upcoming arrival.
Unfortunately, Niffty lost her filter and impulse control looooong ago. Whether it was from years of inhaling fumes from mixing cleaning chemicals or an attempted lobotomy, nobody can tell. Her standing there with the others, just bouncing in place and staring hard enough to drill a hole, is honestly something of a miracle. At least, until her name is mentioned. A microsecond after realizing she's being introduced, she is literally already climbing Satan like a damned tree until they are face to face.
"Hi! I'm Niffty!" she lets out a somewhat cutesy giggle before it turned slightly manic then full manic, "I clean and cook for everyone here. I hope you like the cookies, heehehehhe~"