I kind of like this but I have many questions regarding the small head.
Is this supposed to be some sub-genre of hyper/micro in some way?

Edit: this is just the art style... what.

ᵗᶦⁿʸ ʰᵉᵃᵈ

spotpotlive said:
I kind of like this but I have many questions regarding the small head.
Is this supposed to be some sub-genre of hyper/micro in some way?

Yes, it's to make the character look gigantic. The artist describes this character as "建物よりデカい" or "bigger than a building".

Some quick estimations: Assuming the head is roughly the same size as a human head, this puts the character between 5 and 6 meters tall. So she's about 550cm or 18ft tall.