Arifureta From Commonplace to World's Strongest: Nea Haulia (Season 3)

 After having been trained to fight by Hajime, Nea acts as a hardened and bloodthirsty fighter.  When in the presence of those that she both respects and is intimidated by (such as Hajime and Shea), Nea is able to present herself in a more docile and cute tone.