Vexen

Vexen was a scientist who worked for Ansem the Wise. He was one of the first apprentices of Ansem the Wise, and he was the one who discovered the Heartless. He was also the one who created the Nobodies, and he was the one who created the artificial Kingdom Hearts. He was a very intelligent and talented scientist, but he was also very ambitious and power-hungry. He wanted to be the one to control the Heartless and the Nobodies, and he wanted to be the one to rule the world. He was eventually defeated by Sora and his friends, and he was forced to give up his plans for world domination.