Another good idea to improve Fairy decks would be Archlord Kristya to act as the big beater, but I feel like they're saving Kristya for Kotori once we get Zexal world. Her VA in Japanese version anime runs Kristya.
Kotori practically has no deck, her only notable card is Fairy Cheer Girl. So I can see them giving Kotori her VA's deck instead. They already did it once in another Yugioh game, after all.
Kotori use 🔥ous angel deck in tagforce arc-v special. Since Duel Links grab lots of elements from tagforce, they'll give her angel deck once she unlockable.
Valencia
Valencia