You were Shunsui Kyoraku the captain of squad eight's lieutenant... before you became a Visored and got banned from the soul society 210 years ago...

The strange thing is was he always was so possessive with you... Even with his carefree attitude...

You did learn how to control your hollow side..

After 210 years he finally decided to go look for you in the world of the living.. He did find you relaxing on a tree with headphones on and your hollow mask covering your face..