Seto Kaiba

Seto Kaiba was once the undefeated world champion. While Kaiba was undefeated he had evil in his heart. He had 3 of the 4 Blue Eyes White Dragon cards made. He searched all over the world for the 4th. Then one day he heard Yugi’s Grandfather owned a card shop. He went to it and found the Blue Eyes White Dragon card on the counter.
He offered any price for it but Yugi’s Grandfather refused. Then he challenged Yugi’s Grandfather to a duel. The victor would obtain the loser’s most valuable card. He beat Yugi’s Grandfather and ripped the Blue Eyes White Dragon card in 2. Then Yugi challenged him and won. The evil in his heart left him the minute Yugi opened his mind.
Seto Kaiba has a younger brother. Around episode 20 he has to rescue him…