ChatGPT behaving as a character: how to make it accessible to others?

I have turned ChatGPT into a character, and now I am wondering how to make my character accessible to other people so that they can discuss with it. However, I want to make sure that my prompts are not accessible.

More details: I’m a law professor and I want my ChatGPT character to act as a client in a simulation for students. The goal is for the students to learn how to ask questions of clients and discover relevant facts. So it’s important that the students can’t read my prompts.