Some characters, for whatever reason, are almost universally referred to with some kind of honorific. This makes sense in some contexts, as in polite correspondence and speaking to social superiors / members of an older generation. But all the damn time? It's pretty common, regardless. Just like Spell My Name With A The, where the article is integral to the name, this trope is for characters who have an honorific treated as though it were actually part of their name, to the point of being referred to as such in the credits. This trope was thought up primarily in response to characters in Japanese works who are always referred to as "-chan", "-sama", "-kun", etc., but it works equally well for works in other languages where the character's name does not seem to exist independently from his or her title.

Can be subverted when a character insists on being referred to by a certain title, which the other characters uniformly ignore.

See also They Call Me Mister Tibbs (where a character prefers to be addressed with or without a particular honorific), Spell My Name With An S (where there is inconsistent spelling of a character's name in a given alphabet), Spell My Name With A The (for names with integral articles), Spell My Name With A Blank (for names intentionally omitted).

Anime & Manga

• Mr. Takenaka of Yu Yu Hakusho doesn't take kindly to students who drop the -sensei.
• The gods of the Dragon Ball universe (Kami-sama, Kaiou-sama, etc.) get quite defensive about this, becoming very annoyed when individuals (mostly Piccolo) start talking about them without appending the customary -sama (they're even listed with the honorific in the credits). Goku gets warned by them about showing proper respect once or twice too, but that's mostly because he has No Social Skills rather than Piccolo's self-importance.
• In Anpanman, we have Dokinchan, Uncle Jam (Jam-ojisan), Chibizou-kun, and many more. Notably, Dokinchan started out as just "Dokin" in her first appearance, before having the "-chan" grafted on in subsequent stories.