O
| Character | Actor | Years Active |
|---|---|---|
| Siobhan O'Leary | Siobhan Marshall | 2004 |
| Cherie O'Neill | Teresa Woodham | 1996 |
| Harmony O'Neill | Hetty Gaskell-Hahn | 2007 |
| Hayley O'Neill | Michelle Blundell | 2012 |
| Charlotte Olsen | Nicola Cliff | 1994, 1995, 1996, 1997 |
| Gretchen Olsen | Natalya Humphrey | 1997 |
| Violet Ornsby | Margaret Murray | 1998 |
| Caitlin Owens | Troy Garton | 2007 |
Read more about this topic: Matt Mc Allister, Main and Recurring Characters