| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:12.16 | MAC Jingle Bell | 2025-12-12 |
| 100m Breaststroke | 1:14.98 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 100m Butterfly | 1:13.67 | Border City Invitational 2025 | 2025-12-05 |
| 100m Freestyle | 59.32 | Border City Invitational 2025 | 2025-12-05 |
| 100m IM | 1:10.19 | MAC Fall Fest Invitational | 2025-10-18 |
| 1500m Freestyle | 1:25.93 | MAC Jingle Bell | 2025-12-12 |
| 200m Backstroke | 2:33.82 | MAC Fall Fest Invitational | 2025-10-18 |
| 200m Breaststroke | 2:37.98 | Border City Invitational 2025 | 2025-12-05 |
| 200m Butterfly | 2:47.69 | MAC Jingle Bell | 2025-12-12 |
| 200m Freestyle | 2:10.21 | Gus Ryder Memorial Cup 2025 | 2025-11-07 |
| 200m IM | 2:25.16 | Border City Invitational 2025 | 2025-12-05 |
| 400m Freestyle | 4:38.42 | 2025 Summer Divisionals Island & Coastal Vancouver | 2025-06-27 |
| 400m IM | 5:13.82 | MAC Jingle Bell | 2025-12-12 |
| 50m Backstroke | 33.08 | MAC Jingle Bell | 2025-12-12 |
| 50m Breaststroke | 35.07 | Border City Invitational 2025 | 2025-12-05 |
| 50m Butterfly | 31.86 | MAC Fall Fest Invitational | 2025-10-18 |
| 50m Freestyle | 28.39 | MAC Fall Fest Invitational | 2025-10-18 |
| 800m Freestyle | 9:28.91 | Gus Ryder Memorial Cup 2025 | 2025-11-07 |
Lee, Sion's top personal bests include 100m Backstroke (1:12.16), 100m Breaststroke (1:14.98), 100m Butterfly (1:13.67), 100m Freestyle (59.32), 100m IM (1:10.19).
Lee, Sion swims for Canadian Dolphins.
Lee, Sion has competed in 9 meets.