Bashing Rion for being lazy in her movies (it seems to be a trend) but writing about Nana "excellent performance", while I found her boring or random at best
Really? I didn't know about Koharu joining S1. Wow damn S1 is sucking up all the hot properties.
If you compare the three performers you can see the very distinct styles. For the hack of it, throw Julia in there too, because Julia fan base and Rion fan base overlap quite a bit. Lookwise, Rion is hands-down champ. Julia's figure is close but still human. Rion's figure is Goddess. And Rion's face is cuter too. I like Julia's face, but she does need make up and even with make up, isn't everybody's cup of tea. Nana's tits might be the biggest but they do droop so if you mind droopy tits she's out. And her figures are thick, and face is the weakest amongst the four, in fact her face is ugly by AV idol standard. Koharu is cute and has a nice figure but not competitive in this group.
Oh yes... Rion's aura. I know what you mean buddy.
Anyway the point is to discuss performance. Koharu is perhaps the best performer in this group. She seems happy to have sex without feeling like a slut or whore. Not an intense fucker, nor a delivery health/service maid type, she just gives and takes pleasure in sex. She does have some minimal acting skill (for the non-sex scenes). Out of the current gen, Koharu is one of the few I would mention comparing to the great Yuma Asami.
Nana lacks almost everything to be in this group. Other than big tits she has nothing on the rest of the group. She lacks talent as well. She is not very good actor and nothing special in the sex department either. At least lacking that girlfriend feel of Koharu. The one thing (after her tits) she has and what earn her a spot in S1, is work ethics. In so many sex and non-sex scenes you can tell she's trying very hard. She reminds me of a fat kid sweating like pig and pushing himself to an heart attack just to be a backup player in the baseball team. It's too bad S1 doesn't do stories and plots. I love watching Nana acts and says lines, awkwardly. The fact that she's borderline ugly, technically obese, and losing slowly to gravity, and yet she doesn't give up, she worked her way to the top with minimal talent but maximal drive.
Julia has that reputation of lazy, and with figure type same as Rion, she is the closest comparison. IMHO, Julia's performance is 10 times better. She also lack that natural girlfriend vibe of Koharu, but I also enjoy her very much for her work ethics. Sure I do wish she would do more intense scenes and 3P and orgy. But for whatever reason she is not. Still she is doing enough to stay in my fav list for so many years.
That leaves Rion in a embarrassing spot. She is amazingly beautiful and has an aura and all that. But even with those bondage, fan thanksgiving fest, gangbang vids etc in her resume, she still feel like a rubber sex doll or even porcelain doll. How is that possible? If you actually watch those scenes, she is very passive and just allow things to be done to her. And you can tell whatever being done to her was done with care and precaution, never a spontaneous "I can't believe I have this goddess I am going fuck her silly!" hornyness.
You can say Nana lacks talent and Julia's acting is fake, but there's the effort at least. Rion... especially her trademark paizuri is just letting guys use her mentally detached tits for masturbation. If you watch anime you might know Arpreggio of Blue Steel, Rion is like the mental models of the Fog, incredibly beautiful but lacks self consciousness. Esp. Kongou who appeared in black lace lingerie (presumably she would not mind at all being seen naked) without any shame or excitement.
Look, amongst fans of porn and AV, I am near the extreme end of weighting hot body over performance. Other than Rion, I can't think of another idol with very hot figures but I found dissatisfying in general.