Its even more chuckling because Sara cant tell the difference between Ei and the Shogun
TBF though unless you are either the Traveler, a fellow Archon or Yae Miko, Ei and the puppet are basically one and the same to the residents of Inazuma, the only difference being personality, but whereas the Shogun is more serious and stern, Ei's more gentle side can seamlessly blend into the puppet's persona without anyone noticing.