He rarely used honourifics when speaking, and, even then, usually as a form of sarcasm, for example when he called Deidara "Deidara-chan".
Hidan had absolutely no moral restraints regarding the people he killed; he considered slaughter a religious calling, and often took considerable pleasure in making his opponents' deaths as painful as possible.
In the anime, Yugakure requested that Akatsuki eliminate Hidan for his homicidal acts, leading to Pain dispatching Itachi Uchiha, Konan and Kakuzu to handle the matter.
Upon Hidan encountering the organisation, he attempted to kill Kakuzu, and managed to destroy one of his hearts.
, Hidan) is an S-rank missing-nin who defected from Yugakure and later joined the Akatsuki.
There, he was partnered with Kakuzu, despite the two's somewhat mutual dislike of each other.