Luz Noceda is the protagonist of The Owl House. She is an eager, teenage Afro-Latina human who accidentally stumbles upon a portal to the Boiling Isles. To prove herself as a witch, Luz begins learning magic under the guidance of Eda Clawthorne, despite not having any inherent magical abilities of her own.

Luz is a thin, tan-skinned teenage Dominican-American girl with golden-brown eyes and dark brown hair kept in a slightly messy pixie cut. During her fight against Emperor Belos in "King's Tide", Luz suffers an injury that results in a scar through her left eyebrow. Throughout her stay on Earth, her hair begins growing out, giving it a curlier appearance.

In the epilogue of "Watching and Dreaming", she is shown to have slightly shorter hair and a bit of mascara on her eyelashes. She also got her left forearm tattooed with a symbol of Flapjack in his honor, matching with the rest of her friends.