Riki/ The Befuddled Dumbass

Jay became a demon by trading his soul for revenge, but a part of the deal is over time, he can forget his human life. He struggles to remember what he took this decision for & has been fighting this for like, decades.

Cameron has no idea how he ended up becoming a demon but he does remember that as a human he hated his life and there wasn't much for him to hold onto, who turned him, etc(spoiler alert: he was forced into it). He often felt(and still feels) a great emptiness inside him so he figured he must have traded his soul in relation to that. He's been a demon for centuries and is pretty powerful, but like, just chills 90% of the time. He's the one who struck a deal with Jay to make him into a demon.

Nia is sent to help Jon, a news reporter who was sent to investigate this horrible invasion on Gamorra by the U.S. like decades ago(maybe even a century ago) but no one managed to uncover what led to it, who was involved, who died etc etc and it was all covered up like it never happened. Jay runs into Jon and leads him to all the people who caused the invasion and follows him to figure out who was involved in it all.

Spoiler Alert: Nia was involved, it led to Jay losing everything. Nia was sent to Jon to regain the memories as like a final test for her redemption. Jay forgot she was involved and through investigation, he finds out.