Well, Jake Lockley's origin is deeply tied to Marc Spector's complex past. Marc, due to his traumatic experiences, developed different personalities, and Jake was one of them. Jake was sort of a protector in a way, a personality that could handle the rough and tough situations on the streets. He has his own relationships, like his connection with the cab. He came into being as a part of Marc's mind trying to cope with all the chaos and danger in his life. And his origin story also plays into the overall mystery and intrigue of the Moon Knight character.
Jake Lockley is one of the alters in the Moon Knight system. His back story involves him being a cab driver in New York. He has a more street - wise and rough - around - the - edges personality compared to the other alters. He often gets involved with the seedy underbelly of the city, dealing with criminals and the less - than - savory elements of the urban environment.
One popular 'angel - human' romance book could be 'Hush, Hush' by Becca Fitzpatrick. It has a great dynamic between the main characters where one is an angel - like being and the other is a human. The story is full of mystery and the romance builds up in an exciting way.