| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:13.77 | Delta March LMR | 2026-03-14 |
| 100m Freestyle | 1:03.37 | BC Winter Divisionals - Vancouver & Fraser | 2026-02-20 |
| 1500m Freestyle | 3:37.88 | 2025 Summer Divisionals - Vancouver & Fraser | 2025-06-27 |
| 200m Backstroke | 2:37.45 | BC Winter Divisionals - Vancouver & Fraser | 2026-02-20 |
| 200m Breaststroke | 3:22.67 | 2025 Summer Divisionals - Vancouver & Fraser | 2025-06-27 |
| 200m Butterfly | 3:02.49 | Titans Fall Invitational | 2025-11-29 |
| 200m Freestyle | 2:18.52 | Delta March LMR | 2026-03-14 |
| 200m IM | 2:38.77 | Delta March LMR | 2026-03-14 |
| 400m Freestyle | 4:56.96 | BC Winter Divisionals - Vancouver & Fraser | 2026-02-20 |
| 400m IM | 5:44.31 | BC Winter Divisionals - Vancouver & Fraser | 2026-02-20 |
| 50m Backstroke | 34.49 | Delta March LMR | 2026-03-14 |
| 50m Butterfly | 33.69 | Delta March LMR | 2026-03-14 |
| 50m Freestyle | 30.29 | PSW June Jamboree 2025 | 2025-06-07 |
| 800m Freestyle | 10:07.30 | BC Winter Divisionals - Vancouver & Fraser | 2026-02-20 |
Gullusci, Sienna's top personal bests include 100m Backstroke (1:13.77), 100m Freestyle (1:03.37), 1500m Freestyle (3:37.88), 200m Backstroke (2:37.45), 200m Breaststroke (3:22.67).
Gullusci, Sienna swims for Pacific Sea Wolves.
Gullusci, Sienna has competed in 9 meets.