Sandrone (also called Marionette) is the number 7 Fatui Harbinger. She is always accompanied by a golem-like automaton. A puppet master, she has an outwardly harsh and rude personality, while being more bratty and tsundere in reality. She is obsessed with creating perfect puppets and automatons. She desires complete control over those she cares for, often turning them into her mechanical creations. Calm when focused on her research, she can become hysterical and volatile if provoked.