Board Thread:Fun and Games/@comment-30241447-20181218201646/@comment-36009152-20200127194852

They could be considered family in the sense they now share the same blood. Acting as comrades, or subtly manipulating one another, it's towards the same mutual goals.

If Mahiru had a child Krul could be direct family, or extended since when Krul and Mahiru get what they want it's unlikely they would be hostile to one another. Krul shows a caring side to Mika, no reason she wouldn't want to help raise another child.