Belphagor is the demon prince of sloth. He isin't lazy but very intelligent and automated everything. He loves to invent stuff, complex puzzle cubes and france. He sees art as pointless and things his opinion is always right. If you don't interest him he doesn't care about you. He has telekinesis and modified is body out of Borden. 

For the last few decades Belphegor has lacked ideas and inspiration and is kind of depressed because of it. He basically has a inventing block.