Demerzel is one of the main characters of the Apple TV+ series Foundation. Demerzel is the enigmatic "intelligent robot" and loyal aide to the Emperor of the Galaxy. Patient and watchful, Demerzel is the last of her kind and has guided the Cleonic Dynasty for centuries. She is portrayed by Laura Birn, first appearing in the episode "The Emperor's Peace".
Demerzel serves as an aide and advisor to the ruling Cleons of the Galactic Empire. She was aide to Cleon I, the first emperor of the Genetic Dynasty, and was fiercely loyal to him and Empire. Demerzel oversaw the gestation and births of the clones, and took on a role similar to that of a guardian and mentor to the Cleons when they were Brother Dawn. Among Demerzel's other duties was assisting Brother Dusk with their ascension when the time came.
During the rule of Cleon XII, she, along with the current Brother Dawn, greets the delegations from Anacreon and Thespis to Trantor, and leads them through the Mural of Souls. Demerzel explains its significance to the delegations before bringing them before Empire. Following the bombing of the Star Bridge, Demerzel led Imperial troops to the dwarf planet Aethra, capturing and interrogating the biohacker Jiam Quarver who supplied the bombers with nano-lace explosives.
- Season One