Robina Hughina Rostron Andress was a teacher at Pooi Sun English School. She appears to have been related (sister ?) to Emily May Rostron Tye (nee Andress) and likely had a Chinese-Australian connection.
During the Battle of Hong Kong, she was stationed at La Salle Relief Hospital. Her name/signature appears under "La Salle College" (La Salle Relief Hospital) on the left on the "Day Joyce Sheet" held by the Imperial War Museum.
See: https://www.iwm.org.uk/collections/item/object/30083388. An explanation of the "Day Joyce Sheet" is given at: https://gwulo.com/media/46458
After the fall of Hong Kong, Robina Andress was interned at Stanley Camp.
Source
1. https://www.chinafamilies.net/internees/7129-andress-robina-hughina-rostron/
2. Obituary: https://trove.nla.gov.au/newspaper/article/23023518?searchTerm=robina%20andress