It is just a title.

[ A title that, apparently, seems completely natural to Ange. Despite it not being the most flattering thing ever..

Hence why she seems to dismiss with a vague hand gesture. ]

Ruby and I are working together to make this world the best place it could be. But since I am too tired to use all of my powers right now to expand this place, she is taking care of things in the meantime. That is how we divide the work that has to be done here.