Hidan worships a god by the name of Jashin, therefor after every battle he performs a long and painful ceremony during which he lies on the ground and stabs himself repetedly.
His motto or rather his god's motto is 'anything less than destruction is a sin'.
Hidan is very foul mouthed, and shows a very strong dislike and disrespect to their leader,Pein,and to anyone else for that matter.
Hidan:hmmm before we go I have to pray the gods.
Kakuzu:you're always such a pain in the ass!