The sisters are beautiful seemingly-innocent girls. However their obsession drives them to do cruel things to get the cards that they desire.
Risa Kageyama tries to take Yugi Mutou's "Violet Hecate" card, while pretending to be his friend. Yugi, with the Millennium Puzzle taken away from him, is forced into a Magic & Wizards game with the Kageyama sisters. Yugi is about to lose, until Kaiba appears and takes over. Kaiba defeats the Kageyama sisters, explaining that he should be the one to defeat Yugi.
The Kageyama sisters collectively play a Hecate Deck focused on slowly summoning their "Gorgon" card.