Xentalir was a female individual serving in Starfleet in the 24th century, and was the captain of a Saber-class starship attached to the SCE in the year 2376. Montgomery Scott recommended Lieutenant Borosh to her for the post of SCE team leader on the ship. (SCE - What's Past eBook: The Future Begins)

Co-author Michael Schuster notes[citation needed] that Xentalir's ship was the USS Khwarizmi, though the name is not mentioned in the story.