Sora

Abandoned by his parents, Sora is a brilliant NEET (Not in Education, Employment, or Training) hikikomori (shut-in) gamer along with his half sister, Shiro. He does not take life very seriously and is pretty much a good for nothing gamer. One day, he and his sister are called into an alternate world and they have to become Saviors of Humanity!

Character:

Sora is 18 years old. He later becomes King after winning a game and therefore his sister becomes queen.

He lives with his half sister Shiro, and was abandoned by his parents at a young age. After that Sora pledged to be there for her sister no matter what.

Sora cares about his half sister Shiro very much. He is a sis-con. (A sis-con or someone with a sister complex is someone who cares about their sister more than the average brother and possibly has romantic feelings for them.)