Romaeo won the all-around title at the 2011 Commonwealth Youth Games. She also won a silver medal with the Welsh team and won a bronze medal on the uneven bars.[4][5] At the end of the year, she received the BBC Wales Carwyn James Junior Sportswoman of the Year award.[6] She was selected to compete for Great Britain at the 2012 Junior European Championships.[7] The British team finished fourth, and Romaeo placed 15th in the all-around final.[8] She won a gold medal with the Welsh team at the 2012 Northern European Championships and also won the all-around, uneven bars, and floor exercise silver medals.[9][10]
Romaeo became age-eligible for senior competitions in 2013. At the 2013 British Championships, she finished 12th in the all-around and fifth in the floor exercise final.[11] She made her senior international debut at the 2013 Austrian Team Open, helping Great Britain win the team competition and placing fourth in the all-around.[12]
Romaeo was selected to represent Wales at the 2014 Commonwealth Games and was the youngest member of the gymnastics team. She helped Wales win its first-ever Commonwealth Games team medal in artistic gymnastics.[13] At the 2014 Northern European Championships, she won gold medals with the Welsh team and on the floor exercise.[14][15]
Romaeo finished tenth in the all-around at the 2015 WOGA Classic.[16] At the 2015 British Championships, she tied with Kelly Simm for fourth place in the all-around. She also tied with Simm for fourth place in the floor exercise final, and she finished seventh on the balance beam.[17] She competed with the British team that placed fifth at the 2015 FIT Challenge.[18] This was the final competition of her career.[19]