|Japanese name:||柳洞 一成|
|Character type:||Human, NPC|
Issei is initially presented as the student council president and part of class 2-C. during the preliminaries. As part of the council's job of enforcing school rules, he is performing inspections on students as they enter. After it is over, he, along with the student council members, ensure the the Holy Grail War runs smoothly.