Yeah, they nailed the expression nicely. I was kinda worried about her mouth.
It was definitely a process!
First4Figures is very unique in that they interact directly with their customer base, in their Facebook Original Collector's Club they actually ask members for feedback on their development so often people will give suggestions to improve or expand on what they're doing. In the case of Aika's statue there was quite an evolution, here's a picture showing how her face changed over time from original model, to tweaked version, to final prototype, to physical statue:
I really think they've done an amazing job, and it feels great for the community to be a part of that process and have a hand in a statue's development, it's part of what makes F4F the best in the business.
It's honestly so exciting, and today's the day the preorder's open! I might even buy two to give one as a present.