list of key characters:

1. Alex Reinhart: Protagonist reincarnated with memories of his past life. Cold, calm, and calculating, he aims to change his fate using his knowledge of the future.

2. Maya: Alex's caring and protective big sister figure.

3. Leon Gray: Alex's childhood friend and personal knight. An orphan taken in by the Reinhart family, he's a famous vlogger among noble children. Playful yet skilled, he's deeply loyal to Alex.

4. Ethan Hale: Student at Gaia Academy and future hero. Confident and skilled with a spear, he respects strength.

5. Liana Evangeline: Noble student with red hair, connected to the Evangeline family.

6. Mira Bluecrest: Noble student with blue hair, connected to the Bluecrest family.

7. Elena Ezra: Elven princess, a top-class beauty with green hair and eyes. Elegant and composed.

8. Headmaster Amilia Grant: Youthful-looking headmaster of Gaia Academy, former master of the magic tower. Authoritative and wise, she's over a hundred years old.

9.Lila: A commoner girl with short brown hair. Possible love interest of leon.

10.Sophia Abaddon: A girl from demon race. She maybe a noble.