Ifu Mifune (御船いふ, Mifune Ifu) is the director of the Mifune Institute (御船研究所, Mifune Kenkyūjo) and the creator of Suishou Kibougaoka.
Mifune acts motherly towards Kibougaoka. She enjoys eating snacks.
Mifune has shoulder length, dark-colored hair with a clip on the left side. She wears glasses, a white lab coat, gloves, a low-cut top, and a skirt.
One year prior to the start of the series, Mifune invented Kibougaoka at the Mifune Institute, as the twenty-third prototype of an autonomous humanoid android called Hope.
- Though mentioned in the manga, Mifune only appears in person in the Guide Book.