LSH Laurel Kent

Laurel Kent of Earth was a young woman who happened to be the 30th century direct descendant of Superman. She first introduced herself to a teenage Superboy, then a prominent member of the Legion of Super-Heroes, as 'Elna' (an anagram of "Lane," the surname of Superman's wife Lois Lane). Superboy was initially quite attracted to her, until he discovered to his chagrin that they were related. Laurel had inherited her ancestor's superhuman invulnerability and applied for Legion membership, but was rejected on the grounds that Legionnaires Mon-El and Ultra Boyhad the same ability and she had no other powers.(insert from comicvine.com) Later on it was discovered that she was replaced by a man-hunter robot that tried to destroy the legion