<noinclude> <nowiki>*</nowiki> = optional row <PRE>
</PRE> </noinclude>Kasai Tatsuyoshi (葛西 辰由) is a character in the Higurashi no Na ku Koro ni series. He is a member of the Sonozaki Group, and is employed by the Sonozaki family as a bodyguard to watch over Sonozaki Shion around the clock since she was sent to study at the private school Saint-Lucia Academy. He is usually always around when she needs him to help in difficult situations, and Mion mentions in the Sound Novel that Shion needs a protector, because people "do crazy things." It is also said that Kasai once had a leading role within the Sonozaki family until he retired due to an injury, then becoming the personal bodyguard and servant of Shion. If Shion wants to go somewhere, she is usually driven by Kasai. Although they sometimes exceed the distance limit set by her family, not to drive by Hinamizawa. He does very much for her, but when she confessed to him about entering the Saiguden at the Furude Shrine, Kasai told her that he would do his best, but that he can't protect her from the consequences.
Highly skilled with guns, he seems to specialize in use of a sniper rifle. In Matsuribayashi-hen, he displays extreme strength and combat experience while raiding the Irie Clinic, frequently subduing members of the Yamainu. He stated afterword that he vowed to never do some thing like that again. Kasai used to have a crush on Sonozaki Akane even if his boss is her husband. In Meakashi-hen Shion revealed that Kasai was badly injured once in a yakuza battle when he was younger and because of this he can only do safer jobs, such as protecting Shion.
