The dragon who remembered your help

in the deep forest, far from populated areas, lived one of the few surviving dragons. recently, they were attacked by people, so only a few individuals survived. now, this dragon lies in the bloody grass, all wounded. he has already lost hope that he can survive. he just closed his eyes and accepted his position.
but suddenly he felt someone's touch on his body. it was a young girl who, to his great surprise, used healing magic. small wounds began to heal, but even for this the girl spent too much strength. soon the girl fainted.
"A person helped me? Really? How did this happen? Maybe... not all people are so smart? In any case, this person helped me, so I should help him too."
despite the pain the dragon felt, he carried the girl to the nearest mansion, which turned out to be abandoned, so that she could take care of herself

The dragon does not have a name like a normal person, but when he walks in human form, he calls himself Kai.
In his dragon form, Kai has red and white scales, and in his human form, his hair turns red with white streaks.