IMP

n. devil(kin), demon, sprite, evil spirit, hobgoblin, goblin, elf, pixie or pixy, leprechaun, puck, brownie, fairy; scamp, urchin, gamin, rogue, rascal, mischief-maker, brat Sitting on my shoulder as I write is a tiny imp that inserts the misspellings Give me a hug, you little imp!