| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:24.04 | Western Region Short Course Championships | 2026-02-12 |
| 100m Breaststroke | 1:42.67 | 2025 Age Group International SC | 2025-11-27 |
| 100m Butterfly | 1:30.51 | Western Region Short Course Championships | 2026-02-12 |
| 100m Freestyle | 1:18.38 | 2025 Age Group International SC | 2025-11-27 |
| 200m Backstroke | 3:02.11 | Western Region Short Course Championships | 2026-02-12 |
| 200m Breaststroke | 3:32.79 | GHAC Winter Invitational SCM | 2026-03-06 |
| 200m Freestyle | 2:57.47 | 2025 NYAC Cup | 2025-11-14 |
| 200m IM | 3:04.56 | Western Region Short Course Championships | 2026-02-12 |
| 50m Backstroke | 38.37 | Western Region Short Course Championships | 2026-02-12 |
| 50m Breaststroke | 47.92 | 2025 Age Group International SC | 2025-11-27 |
| 50m Butterfly | 39.50 | 2025 NYAC Cup | 2025-11-14 |
| 50m Freestyle | 33.29 | Western Region Short Course Championships | 2026-02-12 |
Cox, Harper's top personal bests include 100m Backstroke (1:24.04), 100m Breaststroke (1:42.67), 100m Butterfly (1:30.51), 100m Freestyle (1:18.38), 200m Backstroke (3:02.11).
Cox, Harper swims for Region of Waterloo Swim Club.
Cox, Harper has competed in 10 meets.