The Darkstalker Files
An Oma is a role model and source of guidance in a young witch’s life. They serve as teachers, passing on the traditions and culture of their people. Most of what they teach pertains to Gaia and how to use her gifts, though Omas often include other life skills such potion crafting, Veil repair, history, meditation, and much more.
All witches are infertile/sterile, a characteristic they believe was the trade-off for the ability to manipulate life (i.e. Mana). The Oma/Student relationship between witches is often seen as a substitution for the parent/child relationship, a bond witches are incapable of experiencing. This used to be more accurate in a time when young witches were cast out or abandoned by their birth parents, typically around the time their Magic started to manifest.