Harp's gaze sparkled in anticipation. "Sure. What did you need?" He asked curiously, a little nervously. Demons reacted unpredictably to arrows like his. Carefully, Harp would bump his shoulder to the demon, signalling he wanted to get a move on. There was no point in staying in one place all the time. Now that he was stuck here, Harp was determined to make the most of it. 

In all seriousness, he was what you would call an exile. And exiles were, of course, bad. There was no point in keeping angels who allied themselves with demons in the pure realm. Perhaps Harp had allied himself with Bel, but as soon as the arrow's effects came to an end, this lovey-dovey nonsense would be all over and he would be cruelly massacred. He wished there was a way to still return to the pure realm. 

As for his home, many wondered what it was like. In all seriousness, the pure realm resembled the Renaissance. There were shining alabaster buildings and foods so sweet they would melt a human's tastebuds. They had built the human world in the image of their world, but eventually the humans stopped believing in them. When they built a city on the moon, they had kissed their celestial 'friends' goodbye. AS for his life... 

He hadn't explained it to Bel, but Harp was an outcast. Not because of his powers, or because he looked different, but because he distanced himself. Why? As an angel of love, Harp knew the pain it caused in others, and didn't want to get caught up in such a thing. Love could blossom between anyone. Friends, siblings, coworkers... It was better just to let everything go. As such, Harp, though kind, was obviously distanced.