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While the meaning of each charm may not have an obvious answer, I have done my best below to try to make a connection with each of the artworks

Agatha [Reverse Holo] #129 Pokemon Chilling Reign Keep track of your collection value over time

Yu-Gi-Oh Cards - Cyberstorm Access - Booster BOX (24 Packs) YU_5boxa155_CYAC $48.99 Product Details Factory sealed booster box from the Yugioh Cyberstorm Access set by Konami

Madness is a triggered ability

During your opponent's turn: Target 1 Xyz Monster your opponent controls with no Xyz Materials

In the manga, Sherry is a Psychic Duelist and one of the best alongside Aki in Duel Academy Sanctuary