I have no name but one that I was once called by and it was Shadow Assassin. I was once a very powerful soul reaper that I took out 10 Adjuchas with my bankai. That day I will not forget it was long ago and those Adjuchas came into the Seireitei they worked as an unit almost taking out the captains and most were injured except for Kuchiki and Zaraki and I stood upon Sōkyoku Hill and spoke, " Bring Forth the Dark Kingdom Ryu-Kage Gekido Raimei."
My Zanpakutō disappeared into the darkness and I brought forth clouds of darkness and sent down a fury of blazing thunder of which no Adjucha survived. 2 days later I was summoned by central 46 and there was given a choice either I was to be executed or banished to Hueco Mundo never to return to the soul society. I chose the banishmentand they said that I will get a honorable funeral of after I left and I was to have died that night the Adjuchas came. That day a portal to Hueco Mundo appeared and I left the place was life a desert I traveled and ate what I could find which ended up some hollows I killed as I traveled I felt a sudden darkness come over me and after dealing with my inner self I had a mask of a hollow and became a Visored. My mask covered my forehead and mouth and nose and a oval around both eyes and red marks on the lower half resembling blood splatter.
One day as I was doing recon in the desert I saw Aizen, Gin and Tōsen walking I had no idea what they were doing here but as I followed them I accidentally landed of a weak branch and fell behind them instantly I was thrown into battle they couldn't identify me but they know what I was and began to attack I was first hit by Tōsen's bankai but I was able to grab a hold of his sword and knocked him out then Gin used his shekai against me but my Shunpo was the fastest compared to his slow attack and I slashed his right shoulder spraying blood across my mask and then Aizen stood and I knew the truth of his shekai and was able to break its power and charged him just to be bound by Gochūtekkan and I was placed in a chamber underneath the las noches awaiting to be freed, and I was just a support pillar to the building.
As time went by I was forgotten by all but one and her name was Nelliel Tu Odelschwanck but one day she just disappeared. So I sat in the darkness boxes stacked around me and nowhere to go so I slept I awoke to hear footsteps going across the floors and that was all then one day I felt a sudden release and the Gochūtekkan was gone. I got up my own body was almost withered away I found some food and water in some of the boxes there and ate to my heart's content. Afterwards I left las noches and found an opening to the world of the living as I stood in my tattered outfit and I went through the portal and while hiding my reiatsu and I walked up to Kisuke Urahara's shop in the world of the living and I fully know that he could supply me with a Gigai that could keep my reiatsu hidden. I walked up and knocked on the door and he opened up and with surprised eyes asked, "how are you alive I mean I knew I felt you when I opened the gate but I thought you were one of his little pets I mean after all you and him are…" "never bring that up and I wonder if you could give me a gigai." "I believe you want one to hide yourself from everyone right?" "Yes so can you make me one?" "I can but what do you have in exchange for it." "I offer my services even tho it isn't much."
After a time of negations I got the gigai I wanted but I was forced to fight Tessai in a kido battle. I chose to work for a little company making blades and slowly got enough money for an apartment and there I sat alone resting and thinking what is my life now.