PhoenixAsh

Aaron, a wildlife biologist, became a military strategist right after a global war between nations began.

He never wanted to participate in the war but he had to, because he wanted to continue his studies on endangered species the moment the war was over, but to his surprise, everyone in his unit were killed, including him, and the next thing he knew, Aaron woke up in the body of a young noble having a similar name to his.

However, he also noticed he had awoken in a world different from Earth. 

In this world, demonic beasts ran rampart with only one thought in mind, causing them to feed on anyone they see, be it humans, elves or even magical beasts as well.

During his first encounter with a magical beast, Aaron awakened a system which allowed him to bond with magical beasts and to obtain terrifying abilities from these bloodcurdling magical beasts, so he used his experience as a wildlife biologist to help make it easier for him to bond with these beasts.

However, Aaron also noticed he could evolve these beasts if their loyalty towards him had reached a certain level, so he vowed in his heart to grow strong enough to protect those he cared about in this world with the hope of living a happy, peaceful life where he'll be able to focus fully on his passion as a wildlife biologist.

My Beast Evolution System

The chamber fell silent as the battle came to an end.

Seeing this, everyone let out a sigh of relief and Aaron sheathed his sword while breathing heavily.

"It's over," Diana said with a steady but weary voice.

"Yes, it is," Aurora agreed, but Aaron looked around in search of the Frostfang, but once again, the massive wolf was nowhere to be found.

The wolf had spotted them when the group initially crossed through the mountain paths to Winterfell City and it had been following them ever since.

It had followed them due to its curiosity, and it kept a large distance from them so that neither Glimmer nor Thunder would be able to detect it. This was why no one knew the Frostfang wolf had been following them until it saved them from the colossal vermin.

Either way, with the battle settled, the group decided to camp outside the ruins to rest a bit.

48. Winterfell Graveyard.