-Listen. Think about it. -They both have a sort of "trying to appear more mature than they actually are" thing going on. -Leo tries to act tougher than he really is throughout the game. -Lucina tries to shoulder the whole burdon of correcting the future herself, almost killing her possible mother for it. -Despite this they are both good hearted people.. and I think they should be partners. -AU where Lucina joins the Awakening Trio in Fates... -They would be really powerful together (trust).