Dowager is one of three waitresses employed at the Jupiter Café in Tokyo, the other two being Donkey and Ai Imajō.

Eiji Miyake, who frequents Jupiter Café in the novel number9dream, calls the waitress Dowager because he doesn't know her real name and because she "is as brittle as an imperial dowager who poisoned her husband with misery."

Dowager is the boss at the café and treats Ai Imajō poorly.