Born on June 18, 2010, Konstantina Staveri-Polykała lives in Athens.

She is a high school student at the 1st Lukeio of Papagou. Greek is her native language, and she also speaks English (B2 level) and French (A1–A2 level).

In 2021, she participated in the International Program of Leirion, "Συνυπάρχω Ελεύθερα," with the English name "Co-exist Freely," while she was a primary school student. In 2025, she volunteered actively at the "Leirion Alternative Library" to create summer educational, cultural, and entertaining programs for kids. Nantia is an intelligent and active young lady.

Nantia likes drawing, sports, listening to music, and reading Hellenic and English literature. She is sensitive and expresses her concerns about animal abuse, as well as for the single mothers who raise their children with no support.

She loves the idea of MUN because young people can deal with political issues, express opinions, and global social concerns. From her active participation in the Organizing Team of the "5th International Leirion MUN Conference," Nantia anticipates having the chance to meet young people around the globe, discuss her own ideas, improve her social and organizing skills.