| Link | Location | |
|---|---|---|
 | Daria Osadchuk | Zhytomyr, Ukraine |
 | Katsuya Osakabe | Tokyo, Japan |
| Takayasu Osamu | Tokyo, Japan |
| Kyohei Osawa | Tokyo, Japan |
| Tsukasa Osawa | Tokyo, Japan |
| Radosław Osękowski | Rzeszów, Poland |
| Kai Oshima | Tokyo, Japan |
| Pavel Osin | Moscow, Russia |
| Ilona Osińska | Warszawa, Poland |
| Kamil Osiński | Warszawa, Poland |
| Miłosz Osiński | Warszawa, Poland |
| Ezgi Osmanoglu | Munich, Germany |
| Paweł Osmólski | Kraków, Poland |
| Ivie Osobase | Live online from Sydney, Australia |
 | Edgardo Osorio González | Santiago, Chile |
