(Note: Seb is not 'actually' angry at Kadri, relax xD).
This scene takes place before Kadri decides to leave the family pride. Seb decides to teach Kadri on how to better her fights and hunting skills. Amazingly, she is learning fast and well, which is why Seb has the look on his face xD He's not angry, he's just baffled and stunned that she is super good and even better than him, which is why he's a bit jealous hehe.
Kadri proudly grins at her uncle and says, "See, told ya I can do it!"
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Base: ThisLionessGirl(C), DA.
Background: Prince-Voldy(C), DA.
Kadri: Me(C).
Seb: TheRainbowBandit(C).