Gluttony
Coming from Lust, Gluttony starts as a skinny pigman, but grows in combat to be a very giant force to deal with. While skinny, he kind of only oinks a bunch, but once he's fed, he speaks rather sophisticatedly.
The Story of Gluttony
Originally a peasant in the kingdom of the rest of the sins, Gluttony was invited by chance to a royal's party, who was known for sending invitations to random people of the lower class. Gluttony accepted, and during the party, displayed his fine cooking skills, which entertained the rest of the guests.
Seeing the amount of good living the royals had made Gluttony a bit jealous, and when asked about his sudden down mood, Gluttony explained how he wished he could have it all. The individual asking happened to be a fey, and decided to grant Gluttony's wish in return for a good meal, giving Gluttony access to the royal pantries.
Food for years in sight, instead of grabbing what he wanted, Gluttony started to scarf down anything he could, suddenly hit with a ravenous hunger. When guards showed up, Gluttony had eaten so much, that he couldn't run away, and got caught...
Abilities
Since being caught and eventually later escaping thanks to the powers that would develop, Gluttony gained the ability to eat everything, but never be satistfied. The scorn of the royals leeched into his appetite, and made it a magical curse. Gluttony could eat all, but nothing would ever fill him permenantly.
The more he eats, the bigger he gets for a short time, and the stronger he is. This also translates to his summonable pet Mimic, which gets as big as Gluttony does.
Terrible Ability: Temptation
Gluttony's presence makes others want to engorge themselves and only themselves. Should people fall for the temptation of self indulgence, they're suddenly influenced by a very heavy weight, and become unable to move. Additionally, he can make them act on their hunger... against allies.