Mammon is the fifth sister of the Stakes of Purgatory. Represents the demon Mammon and corresponding sin of Greed. Mammon is quick to grab whatever she wants, without any concern for her sisters. Her motto is "monopolize through greed". Therefore, she is usually the main cause of any arguments between the sisters. However, among the sisters, she is the most honest about her own feelings, and is the one most likely to try and please the opposite sex. She is greedy, but a hard worker, and will stop at nothing to capture her target's affections for all eternity. Once she decides she wants something, she will sacrifice anything and everything to get it.

Umineko no Naku Koro ni
The affluent Ushiromiya family patriarch, Kinzo, is on his deathbed, and his family has assembled at their private island to discuss the division of his estate. As they bicker over their father's immense inheritance, a typhoon closes in, trapping them on the island. They suddenly receive an eerie word of warning...and then, in the dead of night, the murders begin. One by one, family members are discovered murdered in bizarre and inhuman ways. Some within the family turn to superstition, blaming it on a witch rumored to inhabit the island. But one of them - the young Battler Ushiromiya - refuses to accept the supernatural and vows to uncover the real killer behind the seemingly impossible slaughters. He soon finds himself confronted by the apparent witch, and enters into a life-or-death battle for the truth.