to act in the way that would be the opposite of how a star be expected to act, to be humble and approachable, to be content with what you have, to avoid the trappings of fame
I met Dave Gahan at a Starbucks in Chelsea and he was totally unstar!
When a specific character from an animated series or TV show can have obvious but not permanent changes to their look such as: hair style or color, clothing, glasses or other accessories.
The upstart knockoff effect is when a character appears that closely resembles a pre-existing character. When this happens, the previous character appears less important.
Definition source: The anime Needless - Episode 5.