How do you get a rat pet Vesteria?

Excuse me, could you please explain the process of acquiring a rat pet named Vesteria? Is it a specific breed or a unique individual? What steps would one typically take to bring such a pet into their home? Are there any special considerations or requirements that need to be met in order to responsibly care for Vesteria? I'm quite curious about the specifics of this process and would appreciate any insights you could provide.