As Mihoshi's direct superior in the Galaxy Police, Nobeyama has the thankless job of trying to keep her out of trouble. But it is not easy. Most of the time, Mihoshi doesn't even listen to what he has to say. As a result, Nobeyama is constantly worrying about his future with the Galaxy Police.
Also to note, Nobeyama is secretly a member of Jurai Intelligence.
(source: Absolute Anime)