Loki

A millennia-old demon worshipped as the Norse god of mischief and trickery.
"He was pale-skinned, tall and thin, with elfin features, long, fiery red hair done up in a ponytail, and bright green eyes. He was dressed in a pale green tunic with a darker green cloak – both were trimmed with fur – and he wore brown leggings with thick boots made of dark leather."
He is mischievous, deceitful, capricious and vengeful.