The Nagaji known today as Hajime Arata (New Beginning) used to be one of the elite guardians of the Star Coil Queen
, an unaging Naga ruler of a Demiplane where she saw all the possible futures of the cosmos and aimed to find the one path to Unity and Harmony.
Arata used to be one of the sons of the Daimyo who ruled the Nagaji followers and led the honor guard of the mighty Naga. His lot was simple, his fights were few, and he was but one of many generations of the Nagaji that would perish during the Naga's endless Quest for knowledge.
Sadly, he was not so lucky. One night the demiplane was beset by a group of Planar adventurers hell bent on looting the glorious castle of the Star Coil Queen. They slaughtered their way through the Honor Guard and killed the Naga Queen. The moment she and her magic were extinguished, the demiplane started collapsing. Ready to die with his ward, Arata was suddenly drawn from his reverie by the screams of the terrified Nagaji who watched their home perish before their very eyes. At that moment he decided he will protect the survivors.
Hajime Arata now keeps the last surviving Nagaji of the demiplane in Sigil's Hive. They have commandeered a number of houses in the neighbourhood and set up their own little fiefdom. Arata has joined the Fated and has picked up a number of less then legal jobs, making sure to provide for his subjects. His proteges in turn have accepted him as their lord. The Nagaji are seen as a criminal gang in Sigil, and most of the Hive's denizens know better then to mess with the serpentmen.
Arata still seeks for a new home for his countrymen, but more then that he seeks vengeance against the self styled adventurers who destroyed his home...
The nice little stick in his hand is Hellcrusher, an ancient magical Tetsubo wrought from cold iron and studded with purest silver. This guy is my character in a Planescape campaign I've been playing recently.