Mai Valentine's Decks

Duelist Kingdom
During Duelist Kingdom, Mai used a Harpie Deck focused on summoning her key card, "Harpie Lady" and boosting its capabilities through various Equip Spell Cards such as "Rose Whip" and "Cyber Shield". Furthermore, she also used a Swarm strategy to duplicate her powered up "Harpie Lady". For tougher opponents, Mai also had a hidden ace, "Harpie's Pet Dragon".

Battle City
During Battle City, Mai used a Harpie/Amazoness Deck. In addition, she also used a large amount of spell and trap cards which protected her monsters from being destroyed such as "Mirror Wall" and "Dramatic Rescue". This deck got Mai to the finals of Battle City, but she was ultimately defeated at the hands of Marik Ishtar during her first duel in the finals.

Waking the Dragons
After becoming a member of Doma, Mai uses a "Harpie"/Burn Deck which became extremely dedicated to swarming through cards such as "Nightmare Tri-Mirror" and "Elegant Egotist". In additon, to match her new tough persona, her deck became more ruthless and powerful through cards such as "The Seal of Orichalcos" and "Harpie Lady Phoenix Formation".