Osiris (ausir)was an Egyptian god as a god for afterlife ,normally his figure as a green face of man as a position of mummy where wrapped legs and crossed hand holding royal symbols (crock and flail),and also he described with a pharaohs beard and Egyptian crown between tow ostrich feathers.
Osiris considered son of the god Geb (earth god)and his mother is goddess Nut(sky goddess),his wife is goddess Isis,and his son is god Horus(the falcon).
Osiris is not only god of afterlife but also he is the sign of the fertile of the flood of the Nile,and also sometimes described as a lord of love.
Osiris myth considered one of the most influential story in ancient Egyptian mythology told us about the murder of god Osiris ,that his brother god Seth (evil god) usurps his throne after he killed his brother and Isis searched for her husband body till she succeeded and found the body but Seth took the body and cut the body into 42 pieces and he scattered these pieces on all over the country,but Isis by the the help of some gods and goddesses created a great magic to back him life and be pregnant from him and gave a divine birth of Horus,after this god Anubis(mummification god),mummified the body of Osiris.then a big war or conflict between Horus against his uncle Seth till he succeeded to kill him in Edfu temple ,and this war recorded on the walls of the Egyptian temples .
Osiris is depicting as (annual flooding of the nile) so he is linked with Orion and Sirius at the start of the new year.