Talk:Minami/@comment-32382644-20171021031908/@comment-25955276-20171021034222

There are multiple meanings for the word "aunt".

You have the familiar aunt, as in the female sibling of your parent.

In this case Tatsumiya being an aunt is a title of respect; much like how many Asiatic cultures have children addressing the friends of their parents as aunts, this is a similar case. Tatsumiya is not actually related to Minami nor Wadanohara, but because she raised Wadanohara, she is respectively known as an aunt to him.