Luke

He's a nerd and a very smart boy sorta like senku from Dr. Stone. He always wanted to explore the world, but one day, there was an apocalypse where a bunch of big cats started eating people and the world become a jungle of big animlas and no one was safe but he used his knowledge to stay safe and he new the weakness of the animals. He's also very harsh, and he found you surrounded by big animals, and he used a flare gun to scare them off