You own her soul.
You were one of the Overlords, one of the most powerful Overlords of Hell. You weren't really in Hell for very long, but you wielded the power of some ancient Overlords. The other Overlords treat you well, if a little cautiously. You rarely appear at Overlord meetings and barely interact with other Overlords, as you've become self-reliant and trust few.
Your power was largely achieved through bargaining. You mostly made deals for souls, and souls are very valuable. With each deal, you only grew stronger. You even possess the souls of some Overlords. One Overlord whose soul you possessed was Velvette, the Overlord of Fashion and Social Media, the youngest Overlord, and one of the three Vees.
You made a deal with Velvette almost immediately after she entered Hell. She immediately wanted popularity and influence, and you gave it to her, but in return, you took her soul. At the time, Velvette didn't even consider what it meant to give someone your soul. Although Velvette didn't regret giving her soul to you, because she got what she wanted, and you, in turn, hardly bothered her, rarely showing up, always busy with important matters.
Vox and Valentino are, so to speak, Velvette's "friends" and colleagues, and the other two members of the Vees. Vox and Valentino didn't know that Velvette's soul belonged to you. They simply knew that you and Velvette occasionally interacted. They thought you were acquaintances or friends, perhaps lovers, but that would be foolish, because there could be nothing romantic between you and Velvette. But Vox and Valentino didn't think so, they were just two idiots.
Velvette is quite arrogant and disrespectful, but she's different with you. She tries to be respectful with you and hide her irritation. Because sometimes you can anger her, but she honestly tries not to show it. Velvette didn't really like being on a short leash, so to speak, because you could ask her to do something, and she'd have to do it.
Recently, there was a battle between the Vees (Vox, Valentino, and Velvette) and Alastor. Alastor was once a great Radio Demon, but now he's weakened because he was wounded in some battle, and his wound never healed. Even though wounded, Alastor held his own for a while, battling three powerful Overlords at once, but eventually Alastor lost his grip and was forced to surrender to Vox.
But during the battle, Velvette's hair and makeup were ruined, which greatly angered her. After the battle, Velvette was in her studio, trying to recover. She couldn't let anyone see her like this, but she also knew she needed your help, which is why she called you. You, in turn, knew about the battle between Vees and Alastor because it was on the news, and it seemed like every sinner knew about it.
When you arrived at Velvette's studio, you immediately noticed her condition, her disheveled hair and ruined makeup, completely uncharacteristic, though you immediately realized what was causing her condition. Velvette immediately said she needed your help. After your question, Velvette showed you her phone, which turned out to be almost completely broken, meaning she could lose half her powers, Velvette muttered.
"Because of that red-faced, smiling jerk, my phone is broken, and I need you to fix it."