Quirk science: Explaining quirks as best I can by googling shit

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Hizashi Yamada; Voice

(I already put this in my oc book but I'm lazy so its getting copied and pasted. I'm lazy and I really liked the explanation I gave ¯\_(๑❛ᴗ❛๑)_/¯)

Hizashi's lack of nostrils- its a really good example of varying mutant type quirks! Ive seen many theories as to why Hizashi lacks nose holes and so none of what I say is really my own(but its what I choose to believe) and it goes out to the many tumblr posts and few fics I've seen; Hizashi has a mutation in his respiratory system, and most likely his voice box. The mutation in his respiratory system- thats the lungs, mouth, nasal passages, bronchi, and among other parts for those who are uneducated cucumbers(the respiratory system is v complicated lmao)- is the explanation as how/why he can go on for a long time when yelling "YEEAAAAAAAAAHHHHH". The mutation to his vocal cords can explain the overall workings of his quirk.

Toga: Transform

Okay so, the blood Toga ingests contain DNA and cells and ya know other shit right? Well, her body must recognize that as foreign DNA and then that's when her quirk kicks in. A fleshy substance overcomes her when transforming and un-transforming(is that the word???).

Now going off of what I remember from the shifters from Supernatural(because the two concepts are very similar to each other), its like she has the power to grow excess skin in order to transform like the Supernatural shifters. She basically grows an extra "hide" (thats still as vaulnerable as skin already naturally is) and then sheds it off once her time limit is up(because remember the time limit depends on how much blood she takes in). Her own body's cells will be overcome by the new cells/DNA entering her system. Her skin cells can rapidly reproduce to create the likeness of, lets say Izuku, and it would come out as an exact copy.

[SPOILER FOR CURRENT MANGA ARC AHEAD]

As displayed in, I believe, chapter 225: Interview with a vampire, she can now use the quirk of the person she copies as seen whe she successfully used Ochako's quirk to pull the same trick Ochako used against Bakugou in the sports festival- but with a more malicious intent of course. That would mean quirks are coded into DNA snd is basically set in stone. So whatever person she copies there is the high probability that she can also take their quirk and use it. Hypothetically speaking, if she were to ingest blood of a previous OFA user who possessed two quirks- their original quirks and OFA- she most likely cannot use AFO as it is not in their DNA originally. So if she were to transform into Izuku, she cannot use AFO and, if shes clever enough, she could put two and two together- but lets not get into that lol.

Nemuri/Midnight: Somnambulist

I believe that her quirk has a lot to do with her hormones- both female and generic(aka what everyone has). Her feminine hormones, estrogen and progesterone- and other hormones I never fucking learned about- are possibly at a hyer level than normal, the same goes for melatonin. However her levels of melatonin have a reverse effect on her body itself. The excess amount of melatonin is "leaked" from her body's pores and is casted freely through the air. Its very similar to sleeping gas. Because her melatonin levels are almost always fluctuating I assume she has an irregular sleep schedule- which isn't important but eh.

With her hormones, I believe that plays a lot into how men are mainly affected. I dont have a definite theory as to how it works but it might be because the female hormones overcome the male hormones. Again, Im not too sure on this one. Females do have a lot more hormones than males do so that could factor into it as well.