I tried doing a real life looking Ratatosk.
Because he is essentially an anime looking character, I'm not sure I achieved what people might envision when they think of Ratatosk looking real.

I used my face structure as the base model and heavily tweaked it. He has a more hooded eye lid, A more pointed nose (Tried giving it a bit of a hawk like appearance). Thin upper lip but big bottom lip (I'd imagine Emil likes to bite his bottom lip when nervous so it's probably slightly puffy because of that?) and a slight indication of a clef chin.