A Caster-class servant introduced in the Traum singularity. He was the leader of the Yellow Turban rebellion detailed in the Romance of the Three Kingdoms. His name can also be read as Zhang Jiao.
In Traum, he appears as the military strategist for the Revenge Realm, working directly under Kriemhild. In actuality, he is the mastermind behind the whole singularity, having been summoned by Specimen E to orchestrate it. To manage this, he creates clones of himself while leaving his true body at Area 51 to avoid the destruction of the singularity in the result of his death.
