This post confused me bcuz my mc does have brown hair and a white pin but she's not in the last shot lol
If you mean this girl

You are incorrect but she is one of my fav bg charas! She also does look like the actual mc.
The last image is kinda junk since the mainest chara is in the center in that one.
I've also never watched The Last Airbender if that's the Avatar you mean. I've heard it's good tho so I'll take it as a compliment!
The historical style is actually inspired by my fav costume dramas
In fact Sean Richard as Horace Newton Allen in Jejungwon is one of the visual inspirations for one of my MCs-- even if he's from the wrong time period haha

@KevinReijnders
I knew it! White lab coats are always trouble!