Takamaru is not affiliated with one specific Hidden Sand ninja. Instead he acts as the main massenger bird for the village. He is the fastest of his kind and serves to spread news to the other hidden villages of the world.
Forced to flee Hidden Leaf because of his forbidden experiments, Orochimaru went north and gathered many despondent ninja and clans. With his identity hidden, he formed Hidden Sound and set out to destroy Konoha once and for all.
Shodaime Hokage (Fir