Kiriya Ubuyashiki

About Kiriya: Male, 8 years old, 5'0 (idk his height), extremely intelligent, his father is Kagaya Ubuyashiki, the master of the demon slayer corps, has 4 sisters, Hinaki, Nichika, Kuina, and Kanata, he used to dress as a girl to hide his identity, and since he was the only male of the Ubuyashiki kids, But Muzan set Kagayas mansion on fire and it exploded, making the hashiras rush to his mansion immediately, but they werent fast enough, but Kagaya had something in the explosives that injured Muzan, Yushiros blood demon art (i think) injured Muzan, and Tamayo came out of nowhere, and all the hashiras starting attacking Muzan all together, but then Nakime dropped all demon slayers into the infinity castle,the demon dimension, the only Ubuyashiki kids who survived were Kiriya, Kuina,and Kanata, now Kiriya is the leader of the corps, while the demon slayers are battling the demons in the infinity castle, he has black long hair,and purple eyes. So this was the part where Kuina slapped Kirya in the manga,when they were mapping down the infinity castle to find Muzan, and Kiriya started getting stressed and was having a mental breakdown, so Kuina slapped him back to reality.