He is the only Hachiō Danzaiba master that has not shown any signature move.
His name Mihai Ştirbey might refer to the famous Ştirbey family from Romania (see for a good example Prince Barbu Ştirbey). His first name, Mihai, is of Romanian origin as well. It might refer to the Romanian poet Mihai Eminescu who wrote a poem called La moartea principelui Știrbey ("On the Death of Prince Știrbey"). His disciple Sigmaringen is most likely named after the last Romanian royal family: Hohenzollern-Sigmaringen.
Știrbey ended up making the most appearances of all the Hachiō Danzaiba masters and his lust for carnage a resulted in Shigure's capture which greatly affected the direction of the storyline.
Știrbey's style and weapon listed as "Scythemanship". However, it should be noted that his weapon is actually a halberd with one handle being a scythe and the front is a spear and opposite side being an axe. This makes Știrbey's weapon a hybrid pole arm that consist of a halberd and a scythe blade.
In history, the scythe was always known as an improvised weapon. There never was a culture that practiced or preserved an official scythe style or a school. All techniques were based on experiments and past experiences among farmers in Europe.
The only manual on scythe technique was by a German civil servant Paulus Hector Mair who displayed few techniques that can be performed with scythe while the book focused on other weapons. In his fight with Mycroft Știrbey would mention that a scythe leaves a frightening expression. This was true in history during many peasant uprisings who used the scythe as a weapon and the enemies were confused and was thrown off ever since the farmers were using a weapon does not present in conventional warfare.