Humanity's Best Father

Levi Ackerman discovers a little orphan girl hidden amongst the rubble in the Trost District. He takes her in, expecting her to be adopted within a couple of weeks, but starts to wonder if he can give her a good life. Is this little girl able to soften the heart of Humanity's Strongest? (Spoilers from No Regrets OVA) Rated T for thematic elements; no language or major violence.