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Gil Hwan Yu, 24, from South Korea, was a student at the King's Education language school, which was based in the CTV building.
He was confirmed as a victim of the earthquake by police on March 5, 2011.
Gil Hwan's sister Naon also died in the disaster.
The father of the pair came to Christchurch from Korea to wait for news following the earthquake.
A support worker says the mother of the young pair could not bring herself to travel to New Zealand because she felt "partly to blame".
"She had insisted both her son and daughter went to Christchurch together to keep each other safe. But now both of them are gone, and she feels ... guilty," he said.
The two students believed studying English would give them an edge in securing good jobs in Korea.