Manga end of course project

Hi Scott!
Finally finished the course for the second time, here are my exercices.
Head and hand proportions:
Eye study:
Expressions study:
Hair study:
And for the final exercice, I decided to do two different things: a study of an "official" manga character (Tanjiro from Demon Slayer), and try after that to do an original one.
Tanjiro:
Original (lines):
Original (lines thickness):
Original (with some shadows):
Thank you for the course, I learnt a lot. I definitely appreciated the insight you gave about the philosophy behind drawing manga. I'd be glad to read any comment you may have on how I can improve!
Have a nice day!