If this game continues on this trajectory, it's definitely going to be a top-tier game when it's finished! It's already pretty entertaining despite being so early in development.
I particularly enjoy the interaction between Alicia and Aura - despite being very different people on the surface, you can see how they share very similar cores, and why they used to be friends. Especially in the way they trash talk each other, and how Aura put on her crazy face to brag about how she couldn't even imagine losing. If Aura didn't care about other people, she'd pretty much be a nerdier Alicia, and if Alicia were less self-centered, she'd pretty much be the queen bee class rep.
I also enjoyed the game's core mechanics; it breaks from the mold in good ways. Amongst other things, the way fights don't giving xp, so there's minimal incentive to grind; having multiple ways of approaching your goals; fights that encourage you to consider the enemy's capabilities rather than just spamming your "good" attack; and resource management that's not completely trivial. I think these all make for a very solid core for the game, and I hope future developers take note.
Now, with the praise done with, I do have to make a demand (one I do note was already planned earlier, so please don't take this too seriously) - I need an Alicia/Aura ending! The two are great together, and Aura needs a new partner anyway after she kills Richard, takes his place as the Dark Lord, and George breaks up with her because she's moved to another world and is hella evil now anyway >_> . Now, part of this might just be because these two characters are pretty much always together and have great chemistry, but... She's way better than the other two leads. Richard's pretty much a more competent cartoon villain (so you're given free reign to conquer a new world with overwhelming might, and you... Plan obsessively on how to make the one woman to ever beat you into your pet? Great priorities there, dude. Did you start an industrial revolution just so you could go to the moon after that?), while George is... Well, there's nothing wrong with him, really. He's just rather plain compared to Alicia.
Fangirling aside, though, I do have some more serious suggestions to make.
First, regarding the surface relationships room; I would suggest changing how disposition and daily routine function here. Instead of disposition changing relationship directly, I would instead suggest that it should act as a cap on how much Aura's daily routine can affect their relationship, which should instead be the main source of relationship change. I say this because it seems a bit backwards at the moment; currently, the biggest changes come from the lever, while her actual interactions with her friends (plus Alicia) don't have much effect at all. And once the events run out, having gone through the trouble of making changes ends up feeling slightly... Wasted.
Mechanically, I think it this would be most straightforward; a simple repeating event where you see Aura walking with her partner, followed by a "Plus 1 relationship with [name]". The person in the first slot fires three times a week; the second two times a week; the third once a week. Tutoring being an exception, firing once a week; evening visits being another exception that fires once a week, but gives three relationship points.
Second, regarding flexibility. While I suspect this is because the game is early in development, I note that the corruption content is currently a lot more linear than the rest of the game, or than the setup would suggest. Take changing her fashion interests, for example; to unlock that, you have to put a fashion magazine in Aura's brain, which in turn requires getting tutoring from Aura. There's nothing wrong with this chain of events, to be clear; it makes perfect sense in how it plays out. It's just that feels a bit restrictive in how you're expected to do things.
For instance, what if Alicia wanted to focus on messing with Aura's happiness instead? I could see increasing her social drive being a good "in" for talking to her about how fashion can make it easier to talk to people. Or what if Alicia felt that being tutored was unnecessarily demeaning, and wanted to leap straight to talking books with Aura? In that case, I could imagine her talking romance novels instead, using the cliche makeover scene as a way of broaching the topic.
Personally, I think that each "step" (for lack of a better word) should generally have two or three different options for how to get there, preferably from fairly different sources; I think this would best balance flexibility with keeping things manageable.
(I swear I'm not saying this just because I enjoy Aura having absolutely trashy taste in literature, and want her to keep that trait on her road to evil overlord. I swear.)
Third, I think it would be a good idea to make it a bit more clear as to how the player is supposed to gain MP. I spent an embarrassingly long time struggling to learn Fire because I never noticed the existence of mana crystals, and thought the only sources were leveling and the class with the magic teacher. For that matter, it might also be a good idea to point out the blacksmith a bit more clearly as well; players are probably used to thinking of it as a place to get new gear, rather than an important source of stats.
Fourth, this might be rude, but I think the game would strongly benefit from a new title. "Star Knightess Aura" sounds pretty generic, and doesn't give a good idea as to what the game is about at all. One option would be to lean in to how the game lampoons a lot of isekai tropes, and name it like it was a light novel: "I was Summoned to Another World as a Celestial Hero, but my Childhood Friend Betrayed Me and now I'm Cursed With a Succubus Stuck In My Head!" (not that Alicia's a succubus, but it gets the idea across). Of course, that might make people think it's more of a parody than it actually is... Something a bit more serious that still gets the idea across might be something like "The Cursed Heroine's Fight to Defeat her Brainwashing." Okay, that's terrible too, but I'm half asleep, okay? My point being that it would really help the game stand out if the title emphasized either the isekai themes, or the corruption themes.
Fifth, moving on to more minor notes... Since you're using some unmarked events (like turning vines into rope, or taking money from dead bodies), I would suggest adding a bit of dialogue to the various decorations in the world. This encourages the player to explore their surroundings, and by rewarding them with a little bit of humor here and there. It doesn't have to be anything elaborate, and it doesn't have to be unique for each item; just a sentence or two to keep the player in the habit of clicking things, so they don't fall out of it when it comes time to harvest a bit of ether. Plus, it helps make towns feel more alive.
Sixth, the subconsciousness rooms would benefit from a way to see the tutorial again, since occasionally it might be a while before you revisit a room; perhaps a quick recap if you speak to your guide?
Seventh, I think the scene where Aura gets judgmental over a couple kissing is a bit incongruous with her behavior in the other world. She hasn't kissed her boyfriend yet, but is willing to let John feel her up in return for teaching her a skill? It feels a bit off to me.
Eighth, I think the game would benefit from a "teleport back to the shrine" item, since it's the main place for you to end the day. None of the areas are excessively long, but if you're, say, spending a lot of time with the blacksmith... It adds up pretty quickly.
Ninth, could you please turn off the sound of the duel in town? It makes sense when you're next to them, but it plays everywhere in town, and gets kind of repetitive after a while.
Tenth, giving the alchemist strange spores is bugged; it's supposed to add vitality potions to his stock, but currently... He seems to just keep them. Well, the player deserves it anyway for turning down that tasty, tasty five MP, I suppose...
Eleventh... This is more of a far-in-the-future-once-things-are-wrapping-up idea, but it would be nice if Alicia had some options for just messing with Aura in her brain, instead of focusing strictly on the plan. Get her interested in a trashy reality TV show (is Alicia into those? I don't want to judge, but she seems like the person who watches them to viciously mock everyone involved), or hooked on a gatcha cell phone game - purely to be petty, and give her something to talk with Alicia about that they'd both be interested in for once.
Well, I think that's all of the useful feedback done with. I've probably forgotten some things, but there will be time to remember later, I'm sure. Instead, it's time for some idle, unsorted observations! Feel free to skip; none of them are insightful or important.
Is it just me, or is Alicia a tsundere? I mean, she spends all of this time talking about how she hates everything about Aura, but... She also spends a lot of time talking about how she's going to "fix" Aura, despises Rose for having "stolen" Aura and ruined her, and seemed genuinely disturbed by how Aura didn't care about herself at all in the happiness room. If she just wanted to make Aura a brainwashed bimbo, I'm sure there would be more straightforward approaches she could take - instead, it seems like she's trying to force her to be her friend again. With a few other things tossed in for petty spite, because she's kind of mean that way.
On the same topic, I can't help but think that Aura would be a lot closer to understanding Alicia if she was privy to Alicia's conversations with her subconscious. She wouldn't agree with her, obviously, but Alicia goes through a lot more effort to explain herself there than she does to Aura's face - and Alicia does make some decent points in defense of her views. Aura would probably see her as more than just a mean-spirited bully if she were hear it.
By the way, that game that Aura wrote... Was the one who commented on it approvingly Richard? Because it seemed an awful lot like Richard. Poor Aura, her worst enemy is the only one to praise her...
Did I mention that the Luck book was pure evil? Because it was. I spent a thousand gold and eight days reading that darned thing, thinking it would help me beat the mushroom... Only to find that I can't even sell it afterwards to try and get my money back. That totally blew a hole in my Corruption, since I needed to use the blacksmith a lot after that to try and scrape together an alternate approach... ...You were totally grinning evilly as you imagined players falling into this exact trap, weren't you. You monster! /joking
I fear for Laura's future. As a named nerd who Aura's personally intervened to help, she has all the flags of being a future victim of Aura's corruption. Well, just so long as she's forced to become someone else on Aura's terms instead of being handed off to a boyfriend to "fix" her, I suppose...
Oddly enough, Laura kind of stands out more to me than Rose does, at the moment. Rose is supposed to be very important to protecting Aura's psyche, but we haven't really seen that aspect of her yet; instead, she just comes across as an entertaining best friend. Their shared love of reading is the trait that stands out most to me at the moment. Which isn't to say she's badly developed; she isn't. Just that I'm looking forward to future revelations.
All of that said... I'm really looking forward to the next update!
(Apologies if any of this was particularly incoherent - I really should have slept before putting my impressions in a comment.)