Yasuko Isayama (諫山 康子 Isayama Yasuko) is the SHSL Confectioner at the rebuilt Kibougamine Academy. Despite her girlish appearance, she is known for having a temper, and is not afraid to speak out if something upsets her.
- 1 - 3 Low - Average
- 4 - 6 Above Average - High
- 7 - 10 Extremely High - Perfect
- The kanji in Yasuko's given name (康子) mean "ease, peace" and "child".
- The kanji in Yasuko's surname (諫山) mean "admonish" and "mountain".