Sora

空

Left behind by his parents, Sora is a brilliant NEET hikikomori gamer, sharing this lifestyle with his stepsister, Shiro. He takes life lightly and is essentially a good-for-nothing gamer. One day, he and his sister are summoned to an alternate world.
Sora is tall and thin with spiky brown hair, and he constantly wears a sly grin. Despite being a NEET and a shut-in, Sora is extremely outgoing and confident, unafraid to play games face-to-face with people, even when they are cheating. He is also highly manipulative, a trait he describes as using negotiating skills. This aligns with his play style. While Shiro excels at logic and computing, Sora can read people and predict their next moves, using this insight to defeat them.
However, if he is separated from Shiro by even a closed door, he becomes a spineless, cowardly wreck, only returning to his former self if he can see her. He views his sister as his equal and partner, but is also protective of her, as shown by actions such as placing his body between her and the ground when he thought they were going to hit hard upon first arriving on Disboard.
Sora is extroverted and has no trouble dealing with people. Although not as intelligent as Shiro, he is shown to have a brilliant IQ. Rather than computing numbers like Shiro, Sora can rapidly calculate what his opponents will do based on observing their behavior and motivations. He is also slightly perverted and desires a girlfriend for himself. His lust leads to a linguistic mistake that causes Stephanie to fall in love with him and results in him receiving a scolding from Shiro.