Rank: The lowest. No one has ever bothered to rank them, since they're simply called Imps.
Weapon: None. That explains why they're the lowest.
Stamina: They can wistand a bullet to the chest, but not more then 2-3, before they dissapear. Or one in the head.
Skin: Dark purple. It doesn't seem to have any armor.
Tranportation: Legs, or portals.