One character may be “Dr Ellis” at work, “Mara” to a sibling, and “Ellis” in the narrator’s account. Those names point to the same person, but they need not create the same relationship. Following the changes can open a quiet route into a familiar chapter.

Write down who chooses the name

Choose two or three passages rather than collecting every appearance. Note the speaker, the listener, the setting and the form of address. A narrator’s label is different from a name spoken aloud. A character can also repeat someone else’s words without adopting that person’s view.

Look for the moment a habit changes

Imagine a colleague who always uses a surname suddenly using a first name. Read the surrounding action before explaining the change. It might accompany an apology, a practical emergency, an awkward attempt at friendliness, or something less obvious. The change is an observation; its emotional meaning is an interpretation that needs support.

Test the interpretation against another scene

Does the same speaker use that name elsewhere? A second passage may complicate the first idea. Instead of “the nickname proves affection,” a stronger reading might be “the nickname appears during two attempts to soften a difficult request.” That is specific enough for another reader to examine.

Names can also shift when stories move between media; changes of narrator in adaptations offer a related question. Begin with the language actually present on the page. You do not need a theory for every name—just one well-supported observation about who gets to call whom what.