Often called the most difficult-to-understand character, Treize has an idealistic view toward war. As he stated in his own words, "selfishly combine war with one's own value of beauty". His rationale is very much similar to Zechs, though the two sides later on became enemies.

He is the aristiracratic founder of the "specials" a group of highly trained and deadly soldiers who have won the privilege to act where ever and whenever they want to.