What is Saber's full name?

Excuse me, could you please clarify something for me? I'm trying to understand the context fully, and I'm wondering if you could provide me with the full name of Saber, whoever or whatever that may be. It's quite possible that I'm not familiar with the term or individual you're referring to, and I'd appreciate the extra information to help me better grasp the situation or discussion at hand. Thank you for your time and consideration.