Friendship
After agreeing to bring Kai across the ocean, the eagle quickly lowered its head and body, asking Kai to hop on his back.
Kai waved to the wolf and said, "(Goodbye.)"
The wolf only nodded his head, not saying anything as if it couldn't bear to separate from Kai.
Now that he understood them more and looked at them, the magical beasts were actually cute. They were indeed aggressive, but there was a kind of charm that pets didn't have.
Unfortunately, he couldn't stay any longer, so he gently tapped the eagle's back as the eagle tugged his son for a while before soaring to the sky.
Kai held onto his fur and made sure he didn't fall off by adjusting his balance. No matter how intelligent they were, they had never once given someone a ride, so it was certainly not the best seat he would get.