BTS plot idea - looking for an angel!

I have been itching to make a demon Jungkook character, so I'll give you my rough plot outline and if you are interested and okay with my rules, please let me know! I'm fine with using other members as my character as well, so it's all up for discussion. It's just the general idea, as we can tailor it to fit your character and implement your ideas as well, so if some part doesn't appeal to you or you have a brilliant addition, feel free to let me know! It's always fun to create something together ^_^
This was inspired by a character created by @Ur_local_meme_sauce as well as Tae's everpresent angel ❤

Character A is a guardian angel, looking out for the people of Seoul. His presence, although disguised, helps guide the citizens on the right path and influences them to make the right choices. Motivated by his mission from God as well as deeply rooted love from humankind, they take good care of the people and the city was considered a very safe place for centuries until something changed...

Character B was an angel once. One of the near perfect beings created by God, not tainted by sin and destined to serve the fragile humanking. After recieving his mission from God, B was excited to take humans under his wings and protect them with love and care. The fate had a different plan for B. He disobeyed the orders from God, acting directly against once of the humans he was supposed to protect. (I don't want to spoil why too much, I think it would be fun to discover in the roleplay) Since then he's been punished by losing his grace and being sent straight to hell. Years of torture felt like eternity in the place where time didn't exist, but the more time B spent in the pit, the more tricks he picked up. Finally tearing theough hell one tortured soul at the time he became a demon - the very opposite of what he was created as. Growing in power, he finally scrambled his way out of hell, with a hatered towards humans and angles as well as his creator himself. All that's left of his angelic nature being the black, broken wings.

The crime rate of the Seoul was rising throughout the last few decades and A finds himself determined to find the root of the problem and do whatever it takes to protect the humans he's responsible for. On top of that, he's gotten the report from heaven that a lot of the souls that they'veve been expecteing to welcome after the death of Seoul citizens, never made it to heaven.

B saw the Earth as nothing worth protecting. Quite the opposite. Motrals seemed to be a waste of the space for him, but it's not like he could take on the entire heaven all by himself. So for now, he focused on one city. Seoul. The city he was once ordered to protect before A took over after his punishment. With his demonic powers he found himself eager to make the whole city fall apart at the influence of evil. To gain more power and further corrupt the citizens, B was taking advantage of the weak, desperate ones and offered them a quick fix in return for their souls. Now the fallen angel turned demon was one of the most wanted on heaven's list as a highly successful pact maker.