Orisa is a playable hero in Overwatch, a sentient omnic tank built from parts of a decommissioned OR-15 defense robot and reactivated by the young inventor Efi Oladele. She serves as a protector and frontline guardian, designed to defend others with strong barriers, crowd control, and area control abilities. In the lore, Orisa is calm, earnest, and dedicated to safeguarding Numbani and its people, representing a hopeful partnership between human ingenuity and artificial intelligence.