Hinatsu

One of the candidates to become the next demon king that is found by Shinku of the Four Heavenly Kings.
A hikikomori boy with wealthy parents, his body has been weak since he was young and he repeatedly went in and out of hospitals.
Because of his shyness and obedient attitude he had a hard time making friends and became a loner.
He loves learning about the world through his beloved books, but his knowledge can be a bit biased at times.
He's wary of interacting with people and doesn't talk much.