Sadie, known as Seiko in the Japanese version, is a character in the Tag Force games. This is a video game version of the anime character, Sadie.
In Yu-Gi-Oh! GX Tag Force, Sadie plays an aggressive Lockdown/Burn deck called The Duel Has Begun!, focusing on dealing damage through cards such as "Solar Flare Dragon" and "Stealth Bird", while stalling with cards such as "Gravity Bind" and maintaining field control with "Swarm of Scarabs" and "Swarm of Locusts"
Tag Force 2
In Yu-Gi-Oh! GX Tag Force 2, Sadie runs three Decks similar to the one she runs in the first game, with a bit more emphasis on Spell and Trap negation and destruction.
Tag Force 3
Tag Force Special