This would be fine if he only ever showed his face to other Sith, such as Darth Maul or Darth Tyrannus, but he appears to others as Darth Sidious several times. One such instance occurs in The ...

In the issue, Luke and Leia come face to face with a Sith demon onboard ... Emperor Palpatine / Darth Sidious, Yoda, Luke Skywalker, Rey Skywalker, Han Solo, Ahsoka Tano Video Game(s) Star Wars ...