What makes a person safe?

To me, a person demonstrates they are safe when they consistently show you that you can be your true self with them (quirky, funny, nerdy, serious, stoic, what have you, Dominant, submissive, kinky or vanilla and even a bit boring at times) and they accept you as you are without any attempt to change you other than to help you become the absolute best version of yourself.

I like how you listed both the openness and ability to learn, which demonstrates the ability to grow, as well as the ability to hold space for one another as areas that prove and provide safety to you. I would agree.