1998 to 2007  
O’Neill attends the Kishibe Ballet Studio in Tokyo. 

 
2008  
She begins study at the Australian Ballet School. The following year, she represents the school at the Prix de Lausanne, where she wins first place. 

 
2013  
She joins the Paris Opera Corps de Ballet.  
 
2014  
O’Neill wins the Prix du Cercle Carpeaux as well as a silver medal at the Varna International Ballet Competition. 

 
2015  
She is named to the position of Sujet and receives the Paris Opera Ballet’s AROP Dance Prize.  

 
2016  
She becomes a Première danseuse and is named best female dancer at the Benois de la Danse competition in Moscow.