It is not clear if any of the five models who have died recently knew one another.
Direct Models said Lua had been battling addiction for some time and was seeking help.
August Ames, 23, right hanged herself on December 5 Days before her death, Lua shared cryptic social media posts including one which read 'no one alive can be an angel forever'.
What prompted her suicide remains unclear but in the days beforehand, she found herself in the center of a firestorm on Twitter after publicly saying that she had refused to work with a man she knew did both straight and gay scenes.
The young actress had been tweeting about how she was alone for the holidays and wanted to call a fan to lift her mood.
At first, it was suspected that drugs or alcohol may have played a part in her death.