Sumire is a character in Jibaku Shounen Hanako-kun. She made her debut in Chapter 66 of the manga.
She is part of the Akane family, to which No. 6 stated that they are that kind of family with children who are offered to God (specifically because of their coveted bloodline). Nene suspects that her full name must be Akane Sumire, and her family name has been confirmed by Teru in Chapter 70.

It has not been confirmed on whether or not Sumire is Aoi's ancestor yet.