| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:36.09 | Walker Invitational | 2025-10-25 |
| 100m Breaststroke | 2:00.35 | CCSC June Invitational | 2025-06-21 |
| 100m Breaststroke | 1:39.19 | 2026 Trojan Pentathlon | 2026-03-06 |
| 100m Butterfly | 1:33.26 | LC Winter Invitational | 2026-01-30 |
| 100m Butterfly | 1:23.78 | 2026 Trojan Pentathlon | 2026-03-06 |
| 100m Freestyle | 1:20.50 | LC Winter Invitational | 2026-01-30 |
| 100m Freestyle | 1:19.92 | LAC - 12 & Under Celebration | 2026-01-17 |
| 100m IM | 1:41.19 | CCSC June Invitational | 2025-06-21 |
| 100m IM | 1:25.67 | 2026 Trojan Pentathlon | 2026-03-06 |
| 200m Backstroke | 3:28.36 | Walker Invitational | 2025-10-25 |
| 200m Freestyle | 3:06.39 | Walker Invitational | 2025-10-25 |
| 200m IM | 3:22.72 | LC Winter Invitational | 2026-01-30 |
| 200m IM | 3:24.29 | BAC SC Fall Invitational | 2025-11-07 |
| 25m Freestyle | 17.03 | BAC Jr Series Finale | 2025-06-01 |
| 400m Freestyle | 6:18.66 | LC Winter Invitational | 2026-01-30 |
| 400m Freestyle | 6:12.25 | LAC - Nothers Fall Invitational | 2025-11-21 |
| 50m Backstroke | 44.37 | LC Winter Invitational | 2026-01-30 |
| 50m Backstroke | 41.31 | 2026 Trojan Pentathlon | 2026-03-06 |
| 50m Breaststroke | 48.41 | LC Winter Invitational | 2026-01-30 |
| 50m Breaststroke | 45.44 | 2026 Trojan Pentathlon | 2026-03-06 |
| 50m Butterfly | 40.96 | LC Winter Invitational | 2026-01-30 |
| 50m Butterfly | 36.31 | 2026 Trojan Pentathlon | 2026-03-06 |
| 50m Freestyle | 35.85 | LC Winter Invitational | 2026-01-30 |
| 50m Freestyle | 33.25 | 2026 Trojan Pentathlon | 2026-03-06 |
Santos, Ester's top personal bests include 100m Backstroke (1:36.09), 100m Breaststroke (2:00.35), 100m Breaststroke (1:39.19), 100m Butterfly (1:33.26), 100m Butterfly (1:23.78).
Santos, Ester swims for Brantford Aquatic Club.
Santos, Ester has competed in 9 meets.