There is a relationship between a character with no concept of sexuality and one that is somewhat sexual, which could be seen as one character being taken advantage of
No, butttt there is a whole "race" if you may call them that, with expressionless faces. It may or may not evoke those of statues, masks or mannequins, and they appear right at the beginning and through the whole series.
Different translations use different pronouns for the characters so there’s fan drama about it, however no one is willfully misgendered in the series because most of the characters aren’t even aware of the concept of gender.
Yes and no. All the characters are sexless/nonbinary, and the majority cannot technically die as they are immortal. It is still implied that they suffer loss from it though
There are, but since the characters are made of chiseled gem and their bodies only resemble that of a human's external appearance, they don't actually seem /naked bodies/ even when they are nude.
It's implied a colony of one of the humanoid species is the descendants of two characters who are brother and sister. They were the last of their kind on Earth so the only way descendants can exist is...
One character experiences extreme memory loss to the point of forgetting who they are. Also, any character can lose memories quite easily, but this mostly just happens to the main character.
One of the characters has a disability where they are in a coma for extending periods of time, getting less time awake every time they come out of the coma. The implication is that someday, the character will no longer wake up due to this disability.
There is body horror, and it gets worse and worse the more the story unfolds, BUT since the characters are made of gems, there is no blood nor gore. However, some scenes can be really gruesome for those sensible to body horror.