Complex sentence: Hisuzu, Kasuri's younger sister, is sometimes hot-blooded and arrogant, often requiring Kasuri to calm her down and, like most of the Demon Slayer families, looks down to the Kuesu and her family.
Split into simpler sentences: Hisuzu, Kasuri's younger sister, is sometimes hot-blooded and arrogant, often requiring Kasuri to calm her down. Like most of the Demon Slayer families, she looks down to the Kuesu and her family.