Kureno-San is half English, half Japanese and was born in Japan. He is now 13 and still lives in Japan, he dedicates most of his time to perfecting his manga, hoping to one day become known for it. He goes to a Japanese Junior High School in Kyoto. He isn't very popular, because he doesn't try to be. He watches a lot of anime, his favourite anime is Death Note.
Here is a guide to some Japanese honorifics:
-San: This is the most common honorific, and is equivalent to Mr, Miss, Mrs, Ms, ect. It is the all-purpose honorgrific and can be used in any situation where politeness is required.
-Sama: This is one level higher than san. It is used to confer great respect.
-Dono: This comes from the word tono, which means lord. It is an even higher level than sama, and confers utmost respect.
-Kun: This suffix is used at the end of boys' names to express familiarity or endearment. It is also sometimes used by men among friends, or when adressing someone younger or of a lower station.
-Chan: This is used to express endearment, mostly towards girls. It is also used for little boys, pets, and even among lovers. It gives a sense of childish cuteness.
-Sempai: This title suggests that the addressee is one's 'senior' in a group or organization. It is most often used in a school setting, where underclassmen refer to their upperclassmen as 'sempai.' It can also be used in the workplace, such as when a newer employee addresses an employee who has seniority in the company.
-Kohai: This is the opposite of sempai, and is used toward underclassmen in school or newcomers in the workplace. It connotes that the addressee is of lower station.
-Sensei: Literally meaning 'one who has come before', this title is used for teachers, doctors, or masters of any profession or art.