Annndd I was thinking when is the loli sister gonna have an impact to the story and she shows up.
Will she proceed to genocide in the middle of town then?
he'll expose her desire for her sister and they have a threesome while her memories are still intact. Then he'll convert her memories to being a imouto role that is also really in love with him.
She's pretty smart and a very reliable tactician so she's a pretty good addition to the team outside of being close to loli territory