She was the second person evicted from the house after failing to rally the women against the men, leading to her initial demise. As one of the first five evicted houseguests, she was given the opportunity to re-enter the house if she won the challenge. Sindy successfully outlasted Naeha and re-entered the house. Using information she gained from the Sequester house, Sindy played more aggressively and orchestrated the blindside of her own showmance, Jordan. However, her time in the house was cut short after Diaper Alliance member, Pilar, won Head of Household and targeted her for eviction. Despite losing the Power of Veto competition and remaining on the block against fellow alliance member Brittnee, she continued to lobby for votes and campaign aggressively. However, Sindy was unsuccessful and was evicted unanimously for the second time, placing 11th and becoming the second member of the Jury.
In Big Brother Canada 5 Sindy played a quieter and under the radar game for the first 5 weeks until she accidentally won the Double Eviction Head of Household and ended up backdooring and evicting Neda Kalantar placing a target on her back. Because of this Dillon Carman won the next Head of Household and he ended up backdooring and evicting her, becoming once again the second member of the Jury.
Sindy Nguyen is a 25-year-old assistant cruise director and pageant queen from Huntsville, Ontario. She claims that her biggest pet peeve is when people spell her name as "Cindy" rather than Sindy. She refrains from using profanity, as she states someone told her she was too pretty to cuss. She described herself as competitive, and cited this as a reason for auditioning for the show. Sindy hopes to play a strong social game, and describes herself as "sassy and honest."
Sindy holds the record for most eviction votes received by a HouseGuest in a single eviction in Big Brother Canada with 12, beating out previous record-holders Anick Gervais and Kat Yee.
Out of both series, she is second to Joey Van Pelt's 13.
Sindy holds the record for most eviction votes received by any contestant in a single season on both Big Brother series with 20.
Sindy, along with Ika Wong and Kevin Martin, is one of three returning houseguests on Big Brother Canada 5 to place higher than they did in their original season.
Sindy is the second houseguest who was evicted on her own birthday and was sent into the jury house, the first is Nikki Grahame in Big Brother Canada 4.
