Loki
Loki is a giant associated with trickery. He’s often portrayed as a villain in most mythological texts. He is adept at shape shifting and can turn into nearly anything, male or female. He did require Freja’s cape when turning into a bird however.
He steals, murders, and causes overall mischief within the god sector, until he is eventually trapped and restrained by the internal organs of his children.
Loki is sometimes confused as being a god of fire with the mistranslation “Logi”, which literally means fire-god.