11 years old. Princess Sisi is eleven years old because the background of the story sets her at this age. In related stories or animations, Princess Sisi is set as a brave and individual character, holding a sword and wearing a knight's cloak. This age setting makes her image more vivid and interesting, while also meeting the needs of the storyline. Princess Sisi is a character in the Zhejiang version of the TV series "Journey to the West", played by Wang Yiqiao. She is the daughter of a spider spirit named Baozhu. She meets Tang Seng and others in the play and helps them.