As a
freshman during the 2021–22 season, Thierry was a backup and averaged 2.9 points per game. She then became a starter in 2022–23, leading the team in rebounding, steals and field goal percentage, while averaging 13.5 points and 6.5 rebounds per game. She averaged 11.3 points and 5.3 rebounds as a junior in 2023–24, then totaled 10.2 points and 5.2 rebounds per game as a senior in 2024–25. She repeated as a Big Ten All-Defensive selection and helped Ohio State to the NCAA Tournament as a senior, with her game in the first round of the tournament being her 100th consecutive start for the Buckeyes. She concluded her collegiate career having averaged 9.7 points and 5.2 rebounds and finished in the top five in school history with a field goal percentage of 59.7%. ==Professional career==