Kellaai, an accomplished athlete, has made significant strides in the world of table tennis. She began her journey at the age of eight at TTV BSM in Dongen, Netherlands. Her early involvement in multiple sports like tennis, karate, and swimming helped shape her athletic career. However, it was table tennis where she found her true calling.

| Season | Event | Rank |
|---|---|---|
| 2020 | Singles - Class 7 | G Gold |
| 2016 | Singles - Class 7 | G Gold |
| 2012 | Singles - Class 7 | G Gold |
| 2020 | Women's Team Class 6-8 | S Silver |
| 2008 | Women's Singles Class 6-7 | B Bronze |
| 2012 | Women's Team Class 6-10 | 9 |
Coach Johan Lieftink has been a significant influence on Kellaai's career. She lives by the philosophy, "You will never win when you are afraid to lose." This mindset has propelled her to numerous victories and accolades.
Kellaai's achievements include being named Female Para Star at the 2018 International Table Tennis Federation Star Awards. In 2017, she was honoured as an honorary citizen of North Brabant. The mayor of Dongen awarded her a Gouden Knoop in 2016. Additionally, she was appointed a Knight of the Order of Orange-Nassau in 2012.
Looking ahead, Kellaai aims to compete at the 2024 Paralympic Games in Paris. Her dedication and past successes suggest she is well-prepared for this challenge.
Kellaai's journey from a young enthusiast to a decorated athlete is inspiring. Her story highlights the importance of perseverance and passion in achieving one's goals.
Kellaai, an accomplished athlete, has made significant strides in the world of table tennis. She began her journey at the age of eight at TTV BSM in Dongen, Netherlands. Her early involvement in multiple sports like tennis, karate, and swimming helped shape her athletic career. However, it was table tennis where she found her true calling.