An "AI maiden" could refer to artwork, particularly images of a woman, created using artificial intelligence algorithms. These images can be quite realistic or fantastical, depending on the artist's intent. You can find examples of AI-generated art online, including some collections featuring "maidens" [search AI generated art].

AI Maidens could refer to imaginary AI-developed or enhanced girlfriends.

Various Text-to-image AI models can produce nude versions of specific humans and humans in general, these might be used for development of AI girlfriends.

AI programs can write the rock group "Iron Maiden" lyrics, etc., unofficially of course.