| Opeila Winters |
Sixth year, Prefect of Slytherin |
6 624 |
2 Jan 2020 |
| Oliver Brown |
Second year, Ravenclaw |
3 133 |
12 Oct 2022 |
| Orion Lécuyer |
Professor of Defence Against the Dark Arts, Hogwarts, II |
645 |
2 Sep 2021 |
| Octavius Baird |
Ministry Level 2 Employee, II |
613 |
23 Apr 2023 |
| Ophelia Northwell |
Second year, Quidditch player, Ravenclaw |
420 |
21 Jul 2023 |
| Odette Haven |
Third year, Ravenclaw |
374 |
16 Apr 2018 |
| Oliver Hart |
Sixth year, Ravenclaw |
142 |
24 Jun 2018 |
| Opal Valentine |
First year, Ravenclaw |
103 |
7 Apr 2024 |
| Odilon Wilde |
Third year, Gryffindor |
88 |
28 Mar 2023 |
| Olivia Choi |
First year, Hufflepuff |
85 |
8 Feb 2024 |
| Orion Neptune |
Second year, Slytherin |
84 |
13 Jan 2021 |
| Oonagh Brown |
First year, Quidditch Player, Writer, Prefect of Gryffindor |
79 |
14 Jun 2024 |
| Orianna Jayne Lightfoot |
First year, Hufflepuff |
74 |
13 Aug 2020 |
| Ogla Crocorith |
First year, Gryffindor |
69 |
19 Mar 2019 |
| Oswald Vanigton |
Third year, Hufflepuff |
68 |
15 May 2019 |
| Oliver Simmons |
Second year, Hufflepuff |
68 |
6 Dec 2018 |
| Orion Ewel |
First year, Hufflepuff |
66 |
8 Mar 2018 |
| Olivia Ludwig |
First year, Hufflepuff |
63 |
14 Mar 2021 |
| Olive Campbell |
First year, Ravenclaw |
55 |
17 Jun 2023 |
| Olivia Blackburn |
Second year, Slytherin |
53 |
20 May 2018 |
| Oliver Averill |
First year, Slytherin |
50 |
8 Dec 2019 |
| Olympia Allman |
First year, Hufflepuff |
46 |
24 Apr 2018 |
| Onyx Moon |
First year, Slytherin |
39 |
16 May 2023 |
| Orion Quinn |
First year, Slytherin |
38 |
22 Jul 2023 |
| Olivia Stewart |
First year, Hufflepuff |
35 |
6 Jul 2018 |