"His right hand wields the Holy Burial Artillery Scripture, a shotgun that fires magical bullets manufactured by the Church. His left hand wields a Demonic Sword Avenger (Enhance) stolen from the former number eighteen Dead Apostle, which scatters clumps of malice when it is swung and can transform into another stage as it is used.""The gun rots his left hand with each use, while his partially-human nature causes the nerves in his right hand to be destroyed with each use of the sword. He displays the ability to easily scale walls like a bat, and he can grow a "miserable pair of wings" that resemble neither those of a bird or those of an insect."
(C) typemoon"

My concept version of him where the creator said he looks like Dante from Devil May Cry. He seems more like Nero in my opinion. The shotgun is a mixture of a t model 1887 chippa, shorty and over/under type holding 4-5 shots. His sword can awaken where the wings can move or extend, hinting it will change forms.