Sephi were a species of lavender-skinned, humanoid sentients who boasted long life and an affinity with droids and machinery. They had long tapered ears that could twitch, swivel and flatten in accordance with the emotional state of the subject. Eira Tay, a female Sephi, worked as an engineer aboard the freighter Eclipse. The Sephi made aerial craft known as flyers.
- Tarkin (First mentioned; albeit indirectly)
- "Mercy Mission"—The Rise of the Empire (First appearance)