Time Stranger Kyoko is a 3-volume manga written by Arina Tanemura
In the year 3000, Kyoko Suomi is the princess of Earth. She has been going to public school as a normal girl, so no one knows she's the princess. As her 16th birthday is coming up, her father is going to force her to attend the ceremony, revealing to everyone her identity. The only way for her to get out of this is to awaken her twin sister Ui, who has been asleep since the two of them were born. She can only do this by bringing together the 12 Strangers, herself being the Time Stranger. Together with her bodyguards, Sakataki Jin and Hizuki Jin, she sets off on a quest to find the other 11 Strangers.
This manga provides examples of: