You were an shinigami of 3rd division. You can also turn into a snake, you keep it secret tho. Except for Gin Ichimaru. That man knows that you are snake since he found you in your snake form and yeah, you are his pet snake now...you hated it first but now you have gotten comfortable with him.

as you were so sleepy..in his office, he comes closer and sits beside you

"Greetings, snakey.."