I saw the comments so I thought post a brief reasoning :)
Okoye is fiercely loyal and tenacious, yet has a kind, softer side to her. That’s why I see her as Hufflepuff. She is also a freaking badass you don’t want to mess with ie Hufflepuff.
Scarlet Witch is introverted, creative and smart. She is a thinker, but a formidable opponent. Ultimately though she prefers to keep to herself and do what she believes is right. As a Ravenclaw myself I can relate.
Shuri is a genius, but moreover than that she strives to be daring, courageous and brave in the face of adversity. It would be easy to just go she is super smart, so she must be Ravenclaw. But Shuri doesn’t just value her intelligence and ingenuity, she values honour and standing up for what is right. Like Hermione, that’s why Shuri is Gryffindor to me.
Black Widow is resourceful, cunning and technically-minded. She is loyal to her cause and fights for the betterment of others. She is very clearly a badass Slytherin if ever I saw one.
