Reality TV hasn't featured in any games, so the staff are all uncreated/unknown. Since you want to avoid making new characters I can suggest the following characters would would be easiest to fit into some role at the station as they're not predefined with an existing job/role:
Unnamed Fat Man: Has only appeared in 1 game so far, nothing is none about what his profession is, doesn't even have a name. Would require new sprites to put him in a suit.
Frank Jones: His profession is unknown (as far as I'm aware). Would require new spirtes to put him in a suit.
Louis Darcy: Investigate journalist with 25 years of experience.
Jennifer Barnes: An aerobic instructor at the fitness centre. Could host a morning exercise program.
Mrs. Stringstein: Thakbor's mum.
Edit: It occured to me that students could be working at a location such as Reality TV as part of a school credit co-op education program.