Every life supporting planet has a mighty spirit tied to it, meaning that the planet itself is actually kind of like a sentient being. If the planet is on decline than so is the spirit (and vice versa). Although this is top secret information, some planets have ceased all communication with one another, and upon further investigation have found out that said planets have been driven completely insane, destroying almost all life on them besides beings known as Yumei. Normal Yumei are created using the planet's energy and in return they preserve and aid the planet in certain duties, but after going crazy they are being created at such a high rate that all energy is drained from the planet just to create them, and not only that but the Yumei do nothing good in return. They simply use the planet as a Yumei production plant, running it dry and then vanishing to who knows where. The cause of all of this is unknown, but it is known that more and more planets are somehow being infected, there is no known cure, and from first symptoms to complete planetary devastation takes around a year from what has been observed.

The symptoms have begun on our planet. More aggressive Yumei are being created than ever before and more natural disasters are occurring. The odds of humans and the good Yumei surviving are slim. Luckily we're here to help, and we'll have plenty of awesome magic slinging action to help shift the odds back to the side of justice!

Yumei come in many shapes and sizes, although some of the more relatively recent generations have child-like human forms (Yumei don't physically age). No Yumei have reproductive organs (or most other human organs for that matter), but they are made to look human because it's a relatively efficient design to suit their needs and it allows them to better infiltrate human societies to watch over them in secret. This practice of spying was in place even before the Yumei became more aggressive, as humans and Yumei have always had a tense relationship. In the eyes of Yumei, most humans are doing far more harm then good, and in the eyes of humans, most Yumei are manipulative authoritarians trying to force humans to behave how they want. Both sides have a point, but both sides have taken things too far from time to time.

Most of the humanoid Yumei are created with a weapon and a certain type of advanced magic. Common magic is available to all of them and is pure energy based such as shooting out laser beams, force shields, etc. Advanced magic can be almost anything such as fire manipulation but is a harder technique to use, having to turn their energy into their type of advanced magic. Almost all Yumei worth their salt can use energy shields, but most stick to their advanced magic if they have it for everything else because it's often more powerful and common magic is for weaklings, as they put it.

Humans have developed technology to be able to do common magic and prototypes for other types of advanced magic are in the works, but in a straight out fight most humans would be doomed to go up against the Yumei. Rare humans are born with/can achieve magic without technology aiding them (they are called Witches/Wizards). Weapons such as guns are total stinkers against magical shields so might as well be toy popguns.

Expect lots of powerful magic shooting, dodging around, exploding, epic sword fighting, etc. The tone can be serious but mostly adventurous and over the top, us obliterating thousands of cannon fodder Yumei in seconds and leveling forests (at least by the end). Imagine this but in roleplay format. Yumei are often a tad on the bizarre side by human standards, meaning we can have a lot of eccentric characters interacting in humorous ways. The Yumei technically have no gender and can't technically experience romantic feelings, as they were designed, but as the story progresses that can change as they become more and more human.

Any interest? This will probably be casual or advanced.
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Highly interested here! I'm always up for anything Touhou inspired, so sign me up. :3

So interest. Much inspired. Wow.

Unintentional moral dilemma for you guys. If the humanoid Yumei and intelligent and develop human emotion, yet are no different then most other types of Yumei besides appearances, the random cannon fodder monster looking Yumei could still be just as intelligent and have feelings, yet will be obliterated in droves. Have fun.
They are still the bad guys though and it would be kind of like humans and animals; technically quite similar but the small changes make a big difference.

Do you think Yumei should have to eat? I was originally not intending them to, but that could easily blow their cover if they are trying to blend in but not able to eat anything without, what, dying, if they can't digest it? Unless they stealthily vomit it back up later. But with no digestive system it would just go into their lungs. I guess eating it is, but they don't have to eat very often unless they want to. Maybe their stomachs can dissolve things all by itself. Their number of organs are limited and highly different than human ones.

You pretty much answered your own question. Though one might wonder why they would have lungs if they don't eat. Oxygen's sole use is after all to burn ingested food.

Also, you put this in the general interest checks again. No one looks here! ლ(ಠ益ಠლ)

But if you get cut off from oxygen, if all it does is burn ingested food, why would you die so fast?

Yumei have magical energy running through their body rather than blood, so wouldn't be carrying oxygen, so wouldn't need lungs, so wouldn't need food, so wouldn't need to eat.

Or they do eat and have lungs just like a human.

I guess your brain just shuts off cause the mitochondria inside it can't burn calories anymore. I dunno, i'm not an expert either.

It seems the Yumei would look more human if they eat occasionally, and looking human is beneficial to their cause.