Kleio-Effrosyni Papanastasiou, a student of Athens College High School Grade 2, participated in the following fencing tournaments:

1st Fencing Epée Cup (U17 category), held in Vari, on September 27, 2025, where she achieved 3rd place.

2nd Fencing Epée Cup (U20 category), held in Florina, on October 25, 2025, where she placed 1st.