Obachan
Obachan was the nickname Keiko Ishikawa gave to her grandmother. 

When Keiko was 8, she used to help her obachan create beautiful pictures of Japanese brush writing and calligraphy and was responsible for bringing fresh water for the ink brush. Keiko had forgotten the memory, but Tarmin from the Ullian delegation of telepaths helped her resurrect the forgotten memory. ()

See also 
 Bisabuela
 "Moogie"
 Foremother
Nicknames