Found the following info from this site. Thought the page could use more info, but didn't think adding random, untranslated and unknown text would be smart...
蓮子 星の光で今の時間が分かり、月を見ただけで今居る場所が分かる
- The light of the stars tells her when it is, the sight of the moon tells her where she is
JadeCicada 23:33, 6 Oct 2005 (PDT)
changed 'human GPS' to 'living GPS'. i dont know whether she's a human or else. well, actually i dont really know whether she's 'living'. :-P
Surname[]
Usami is made of characters that mean "sky", "help", and "see". Maybe her last name is related to her ability?