No 1 is not actually a demon. He is an imp. Furthermore, he is a warlock.

No 1 has the general skeletal structure of a proper demon. He is about the same height as a sheep sitting on its rear. His skin is gray as moon dust and pebbled with armored plating. Spiraling red runes wind their way up his chest, up along his neck, and across his forehead. His eyes have striking orange irises, and his jaw has a noble jut about it, or so he liked to think. Others call it protruding. Two arms, slightly longer than the average human ten-year-old, and two legs, slightly shorter. Eight fingers, eight toes. One tail, more of a stump. At fourteen (or roughly, it's hard to be exact in Limbo), No 1 is the oldest imp in Hybras. His nickname is Runt.