Thank you for all you do.
I'm in favor of retaining Mimiri, Reo, and Risa. It's what you've already done thus far, and consistency for your specific TL work seems entirely appropriate. Given it's no less correct when working with Japanese pronunciation, I think it's entirely acceptable to simply continue.
--
I really like Reo's inclusion into this series. I think that she provides a fantastic second viewpoint and contrast to Mimiri for the sake of guiding Niina, and not just because she's giving Niina technical knowledge. But her observations surrounding Niina's relationship with the few subjects she does photograph in this chapter also feel very important.
Even if Niina doesn't actually identify with the "lone flower", there's symbolism there that ties artist to subject. Niina made a snap judgment in taking that photo--and it feels important that she retain that feeling, even if she can't (or can't bear to) analyze the why in her taking that photo. That spontaneity will be her greatest strength, as it will both create meaningful photographs that clearly already resonate with those who see them, and it will aid Niina in finding ways through her chronic indecisiveness. A true win-win, in that regard.
And the konpora of Reo herself, is another view into Niina's own relationship with the world around her. She's "the pretty girl who won life on looks alone", but internally she agonizes over every decision, ever fork in the road, and the way she's perceived by others has closed her off in a big way. She has a friend group, sure, but Saki seems to be the only one of those four who really take the time to walk apace with Niina (even if until recently it was in a "mother hen" capacity of caretaker/minder). Now she has Mimiri and most recently Reo, but they are mentors first and foremost, at least for now.
So Niina is largely removed from everone and everything else, by way of her internal struggles and her anxiety in interacting with things because of the decision making involved.
Capturing that concept, and that emotion, in the literal framing of her shots is a neat way to depict and capture her perception of that relationship.
And hopefully, she can find ways to lean into her "weaknesses", because through another lens, they could become strengths that make up a solid core of her professional career with a camera. And, they represent a way for her to become at peace with herself, and accept who she is--flaws and all--and grow in the process.