Letton-Jones, from Y Felinheli in Gwynedd, has albinism, a congenital condition that severely affects her sight, so she has to count her strokes to know when she is approaching the wall of the swimming pool.
That has not stopped Letton-Jones from following her dream to reach the 2028 Paralympics in Los Angeles.
After narrowly missing out on the Paris Games in 2024, the teenager was invited onto the Aquatics GB Para-swimming world-class programme.
Letton-Jones won silver in the women’s 100m backstroke S12 on her World Para-swimming championships debut in 2025.