Athens College High School 2 student Irini Maria Nikolaou, participated with her team in the following Championships:

-In the Panhellenic Junior Water Polo Championship (U17), which was held in Thessaloniki, on July 11-14, 2024 and won 1st place.

-In the Panhellenic Junior Women's Water Polo Championships (U19), held in Glyfada, on March 29-31, 2024 and won 6th place.