Jamo was a muscular man with a black sizable afro. When using the gravekeeper's secret arts, he gains danger beast features of a squid.
He was a jokester who liked to call himself "Uncle Jamo" as well as a womanizer as best seen when he examined a captured Gin.
As a member of the Gravekeepers, Jamo could use the Gravekeeper's secret arts which allowed him to transform a part of his body into that of a danger beast.
His use of the secret arts allowed him to transform his arms into those of a squid, secrete a fluid over his body that makes him tough to hit, and project ink from his mouth.