Tried recreating Narillia as she was before. I realised that the main difference in Narillia's appearance that bothered me between Amanatsu and Amanatsu (anima) was her bangs. I don't know how I only noticed this recently, but Amanatsu (anima) tends to have "center-flap bangs" as default. Once I've put it in the negative, it worked out.

#1 is the recreation.

#2 is the original.

There's also a whole thing with the smiles, but that's a discussion for another time.