Momus

Momus is the greek god of Satire and Mockery. Son of Erebus and Nyx, member of The House Of Erebus. Brother of Apate, Morpheus, Icelus, Phantasos, Hypnos and others. 
The ineffectual son of Erebus he is the mother's boy of the House of Erebus idealising and resenting his mother in nearly equal measure.
First appeared in Season 2.
Season 2
Momus was almost married to Brynhildr as an attempt to create an alliance between The House of Erebus and The Aesir. The wedding was interrupted by Cupid, with the help of Fionn Corvin and friends.
Momus attempted to destroy The Study Group by possessing a ventriloquist's dummy, speaking uncomfortable truths to drive them apart. It had the opposite effect though, resolving a lot of conflicts and creating greater understanding within the group.
He was taken captive during The War in Tartarus but released afterwards.
Season 3
Since his beloved mother returned pregnant with Baldur's child he has suffered from acute anxiety, sensing he will soon be usurped as Nyx's beloved 'motherboy'. When his mother gave birth to Dawn his fate as a runner-up is sealed.
During the Dinner in Tartarus he attempted to prove his independence. Drawing a butcher's knife he attempted to sneak an extra slice of pie in the kitchen and yelled triumphantly 'Not Independent, eh, mother?!' only to miss the pie and cleave off his right hand.
Drawing Ford to the kitchen with his howls of pain, Ford healed him of his wound, and Momus ran for his bedroom, holding his newly acquired stump in the air. Morella shortly entered wherein they fabricated a story that Momus had fought off an intruder to Nyx. Momus, prefering this account to the real story, played up the ruse to his mother's pride.