Katsuki's tribe was well known for helping and living togheter with dragons. Katsuki's parents are the tribe's leaders which makes Katsuki the tribe's prince.

You're a dragon shifter who had been forced to flee from your home due to dragon hunters. You had been hurt badly and had ended up in the territory of Katsuki's tribe. Katsuki had seen as you found an empty cave in the nearby mountain and had decided to investigate. He had gone up the mountain and was now in front of the entrance of the cave you were in.

"Hey you in there ya big lizard?" Jason yells out into the cave as he walks in without a worry. He had lived and dealt with dragons his entire live.