Set
Set was the brother to Isis and Osiris, and his wife was Nephthys. Set was a hostile God, and though he was within the family lineage of the other Egyptian Deities, he was usually associated with foreign lands and people. He wasn't a truly 'evil' being, but today he is considered to quite similar to the Satan of Christian mythos. Set ruled over storms, chaos, war, inhospitable places, hunger, and the cold.
In many myths, he fought with both Osiris and Horus. At one point in earlier history, Set was not an evil character at all, and was worshipped much like Horus was. The myths may be representing events in real life, where the followers of Horus fought with the followers of Set. Upon winning these conflicts, the Horus-worshippers changed Set into a more negative figure in order to elevate Horus.
The Hyksos people, who identified him with their own warrior God, elevated Set to the main God in Egypt after they invaded the land. It was these events that likely contributed to the association between Set and foreign people.
His animal form is a bit of a mystery. Described by some to be like an aardvark with a long snout and big ears, the exact animal that is used in his depictions is unknown. His human form was pale of skin with red hair, a feature that the Egyptians felt was evil.

