Of the character's sexuality, "She has commodified her sexuality and I was interested in exploring that side of the character."[15] Trieu Tran as Mister Leung / Ghostwalker (season 1), a killer and "fixer" who kills and solves problems for a mysterious employer.[16] Renée Elise Goldsberry as Quellcrist "Quell" Falconer (née Nadia Makita) (seasons 1–2),[11] a master strategist and scientist, the creator of Stacks and leader of the Envoys.