This is adorable and I love that the Sappholopods are getting the appreciation they deserve, but...
I gotta criticize that design of human!Marina. Look, I give plenty of slack I probably shouldn't to artists who wind up not coloring in her skin in a black-and-white comic, or pick a slightly too light shade when trying to stick to pastels, whatever. But I gotta draw a line here with this Marina, cuz it takes a very black coded character and, well, doesn't depict any of that blackness in the new design. Not just making her skin barely darker than Pearls, which is not good in and of itself, but the hair that's the real problem here. That kind of straight, vaguely messy hair tells me the artist wasn't sure how to translate the tentacle hair into a human, and thus wound up making a vague approximation based on what they already knew about drawing hair.
The problem is, it effectively whitewashes the original design because nothing about the new character exhibits any of the racial characteristics of the original. That's no good. Without context I could not tell you that's supposed to be Marina.
Absolutely my first thought. I know anime has a habit of glossing over race but this is pretty abhorrent.
Female virginity is pretty much entirely a myth. The hymen isn't a dam or film across the vagina, but rather a flap of skin that rings the circumference of the vaginal opening. It's true that sometimes the flap can be torn or damaged in rough sexual intercourse but if you're gentle and liberal with foreplay it doesn't really happen that often. Just like vaginas and labia hymens are diverse and different between different women, and many women don't have them at all.