I liked Kira as well... and still do haha. She was, i think, the only one that had a contentious relationship with the MC so there was a decent growth story arc. Even though now shes a puppy following the MC
But honestly one of my favorite scenes was when the skeletons attack and she sacrificed herself only to be saved by the MC as he fights for hours and finally goes nuclear saving them. An epic moment. From then on shes in constant awe at the MCs powers and that was endearing. I know people dislike the pirate stuff but i loved it.