Laughing a bit at Bel's words in an attempt to loosen up, Harp couldn't help his gaze keep darting toward Darri. He was nervous. This demon could be capable of things beyond his imagination- granted, he had a very vivid one. The only reason he had gotten this far was because of his trump card. His arrows. If you could imagine all the angels and demons as cards in a poker game, Harp had a pretty good idea where everyone stood. 

The number cards would be all the angels and demons in between. All the mediocre and sub-par angels who were kept alive as body shields. All the demons who clung to each other to be almost half as strong as the arch-demons and arch-angels were. However, if the right combination of them got together, they could cause havoc. Similarly, if you get a flush, it can be comparable to face cards. Maybe even better. The face cards would be the higher-ups. Seraphs, Kisshin, Virtues, reapers, and Sins all belonged in this category. Though they were by no means weak, they weren't as strong as the arch-demons and arch-angels. They were more like jokers. The most versatile, and the most powerful. 

What was Harp? Normally, you would categorize someone of his caliber with the number cards, but you must understand- he wasn't just any powerless angel. He was a cupid. His powers were risky, but could prove to be extremely effective. In this way, he was an ace card. It could be either the most influential- or the most useless. 

Meanwhile, Bel had left him with this demon. This was his chance to learn more about their kind, should he ever need the information. Harp paid close attention to the demon, he recognized as a number card. At first, he was intimidated by the form he took, but realized that perhaps he took this form because he was weak, and needed every chance he got? Harp simply was silent.