asuya

Roy died during a war against the Evil God Cult, but somehow, he returned back in time to 30 years in the past where he was just a boy who awaken his summoning magic. 
Just a few days before his death, he became the only Aura user in a world of magic. 
Using his knowledge and experience, he will become an Aura user again, faster than his previous life. 
Accompanied with a shape-shifting black slime, he will make sure to protect everyone he cares about and win against the Evil God Cult.

The Only Aura User In Magic World

So after just a bit of talking, the Kaiser Whale decided to help us. By making Spot to be his successor.

"Are you sure that it's fine for the conqueror of the sea to leave this world?" I asked again just in case.

"It's fine. Nowadays, there are a lot of monsters being disrespectful to me. Young monsters these days. So it's not like we have anything important to do. Rather, I do it just for tradition. To find the next conqueror of the sea," the Kaiser Whale said.

"I also don't care much about what we need to do. I'm just doing what my instinct telling me to do. And it's to raise my great grandson to be the next Kaiser Dragon," Andro said.

What about the Kaiser Tortoise then? Well, I don't think he can think much other than protecting his children when he was totally getting himself experimented on.

Wait, that Kaiser Tortoise was a male, right? Does it mean that the tortoise children still have their mother somewhere?

Potential to be Kaiser Serpents