I think you're missing one of the main points of the wiki: this wiki is supposed to document aesthetics. (From the homepage: "Our wiki is a comprehensive encyclopedia of online and offline aesthetics!" (emphasis mine)). Kidcore, Traumacore, Babycore, Cripplepunk, (etc.) are all aesthetics that exist in some form or other.
(Side-note: Read the page on Cripplepunk. I fail to see why embracing disabilities and accessibility is (in your words) "absolutely detestable.")
I'd take a look at Pastel, as well as some of the aesthetics in the Fields and Forests category. In particular, Hikecore, Adventurecore, and Naturecore might have what you're looking for. I also recommend reading the finding your aesthetic page for more information about figuring out your aesthetic.
Yes, it is possible to like almost everything and not have a specific aesthetic. I'd say that most people do not have a particular aesthetic and/or have no aesthetic whatsoever. "Aesthetic" is an arbitrary term used to categorize things - a genre, if you will. It is useful to find things that you might like, but it doesn't have as strong of a significance in most people's lives as some people here seem to think it does.
You can like an aesthetic without living an aesthetic. For example, I like Synthwave, but it doesn't impact me; you certainly wouldn't look at my life and so "oh, it fits into the Synthwave aesthetic." Similarly, there are people who enjoy Vaporwave, Ocean Grunge, or Cyberpunk . . . but a list of what they like might not reveal that, or would identify them as some other aesthetic. If you took all of my interests and hobbies, you'd probably come to the conclusion that my aesthetic is Dark Academia. Yet I have no interest in Dark Academia, nor would I label my personal aesthetic as Dark Academia. I'd call my personal aesthetic Voidpunk, but you wouldn't get that from a list of what colors and art styles and genres of music I like.
You want to find your personal aesthetic? Click around the Wiki for a few hours and see what resonates with you. I strongly suggest reading the finding your aesthetic page.
At the end of the day, you do not have to fit into a certain aesthetic, nor do you have to define what your aesthetic is. It's a mix of interests and personal tastes that forms over time, and is rarely something that can be encompassed by a single word(/words) or phrase or dictionary definition.
Side-note: The vast majority of the time, physical appearance bears no correlation to your aesthetic. Same goes w/ gender.
I think that there's a bit of Ethereal in there.
However, I strongly suggest reading through the excellent finding your aesthetic page. Click around the wiki and see if you find anything that clicks with you; scroll through the list of aesthetics and click on random things. Remember: people do not tend to fit into one single aesthetic and instead blend aesthetics; furthermore, you do not have to have an aesthetic.
Off the top of my head, I think that Pastel, Softie, Sanriocore, and Light Boredom share some similarities with Kawaii. Pastel Academia also applies elements of Kawaii to an academia setting, if you're into that.
You'll have to reach out to a mod if you want an accurate / exact answer / explanation for why they were merged / why Poolcore was deleted. I cannot accurately speak for why Poolcore was deleted.
(IIRC, they were merged because Poolcore was essentially a single-subject page, so it couldn't exactly stand on its own. There was enough overlap between Poolcore and Vacation Dadcore that it made sense to merge the two - Poolcore imagery is Vacation Dadcore, in some ways.)
I think the page was merged w/ Vacation Dadcore.
I stumbled upon vaporwave and dark academia around the same time . . .2016-ish, I think.
Aesthetics as a whole have had a mixed impact on my life. I wouldn't quite call them life-changing; they're just another thing that I'm interested in. Some - mainly dark academia - have had a negative impact on my life. Others have introduced me to different media/music/styles/etc.
On top of what people have already suggested, I'd take a look at Naturecore and Butterfly. There are also some similarities to Adventurecore and Bloomcore.
Sounds a bit like Science Academia.
I'd also recommend that your friend reads the article on finding one's aesthetic if she wants a better idea of what her aesthetics are.
Also - remember that not everybody has to have their own aesthetic, and that people don't fit cleanly into single aesthetics. Rather, people tend to be a mix of different aesthetics.
I've seen people call some of these images Indie Kid.
Here are some lighter aesthetics that say they're related to Goblincore (in terms of hoarding things): Pigeoncore, Fairycore, Miniaturecore, and Pixiecore.
You might also have luck looking at related aesthetics on their Wiki pages.
Anime, Spacecore, Adventurecore, or Art Hoe might have what you're looking for.
I would also look at Academia aesthetics - in particular, Science, Classic, and Art might be up your alley.
Also - gender, sexuality, and zodiac signs aren't really useful for finding aesthetics. Your aesthetic is mostly based off what you like, are interested in, or 'vibe' with.
I don't think there's a specific aesthetic that can represent a single age, since aesthetics tend to be based off of fashion, philosophy, interests (etc.). And those vary. They don't align themselves with a single age, they just . . . are.
Fearofdolls (Fearof___, where ___ is another noun. Or verb. )
I'd suggest just playing around with adding different words/phrases to 'Fear' or 'Sad' and seeing what works for you. An aesthetic username is a bit subjective (meaning that not everyone will look at a username and think it's aesthetic . . . it's really just up to you to decide if it's aesthetic or not).
Too many. Right now, I think that Cybergoth looks really cool. I'm also partial to Synthwave, Cyberpunk, Voidpunk, and Mori Kei.