HELP ME!! What does chan mean?!For example, Sessy-Chan, what does the Chan mean in Sessy-Chan? TELL ME PLEASE!!!!!

Chill out, I'll help you, chan expresses that the speaker finds a person endearing. Chan is used for babies, young children, and teenage girls. It may also be used towards cute animals, lovers, close friends, ou any youthful woman. Chan goes after your donné name and means "cute little". It's usually used for girls. So no real meaning.