Prior to Stanford
- 2024 Olympic athlete, swimming the breaststroke leg of the 400 medley relay for Greece in Paris.
- Earned a gold medal at the European Junior Championship in the 100 breast in 2026, after earning a silver medal in 2025
- Two-time European Junior Champion (2024, 2026)
- Competed for Greece at the World Junior Championship
- Personal Bests
- 100 breast - 59.77
- 200 breast - 2:10.76
- 200 IM - 2:05.29
Personal
- Son of Maria Karasmanaki and Christodoulos Ntoumas
- Has one younger sibling, Vasiliki
- Interested in studying Economics at Stanford