Makoto Aizen (愛善 真)

The fourth of the Four Temple Guardians who also worked as the Temple's janitor. He was defeated by Kyoshiro Kokujo before he could fight Shobu. He also lost to Hakuoh in Duel Masters Battle Arena Tournament. In the later season, he is shown to be using a Fire/Light Civilization deck. His trump card appears to be Warlord Aizonius.

(Source: Wikipedia)