Миа Луна Тиамун

Mia Luna Tearmoon is the princess of the Tearmoon Empire, being the only child of the current Emperor. Following her execution at the guillotine by the hands of the revolution army, she wakes up to learn she has return to when she was 12 years old, before the downward spiral and decline of the Empire that lead to her death. She finds her bloodied future diary, and decided to use it to change events to ensure she doesn't end up at the guillotine once again.