 Complete the following phrase:  Castles turned senior in 2018. She competed at the British Championships as a guest and finished in fourth place amongst the other guests. In June Castles competed at the Nordic Championships where she helped Sweden finish second behind Norway. Individually she won gold in the all-around, on balance beam, and on floor exercise. She next competed at the Swedish National Championships where she placed first in the all-around, on balance beam, and on floor exercise. Castles was selected to represent Sweden at the 