Mercury

Mercury, of The Romans. Roman Messenger God of Trade, Thieves and Travel. Son of Jupiter
First appeared in Season 3.
Season 3
Was present when Ford made his first trip to his house (the former Olympus) when Ford was a guest of Jupiter. Stewed jealously in the background while Jupiter praised Ford and was eventually dismissed by his father.
Attended Ford's Halloween party in as an 'illusionist'- dressed in a midnight blue wizard's costume spangled with yellow stars, a wand and a crooked, pointed hat.