This is all **Assuming**

Assuming Kitana remembered her mother Sindel.

Sindel = Edenian face

Kitana knew how she looked; there must be mirrors in Edenia.

Kitana = also Edenian

There was no doubt for Kitana she was the daughter of Sindel.
I suppose everyone agree on this..

Now my point is.

If Shao Kahn ever removed his skull helm during the more or less 10 000 years he made believe Kitana he was his father, she would have seen his face.

--- assuming Shao Kahn has this face ---





If she really trusted him and thought he was her real father, then Kitana might have believed Mileena was her true sister when she grew up. Kitana would be thinking: "We both share traits of our parents, maybe I look more like my mother, and Mileena looks more like my father."

Either Kitana thought of herself as the most beautiful
or she thought her father's race was to be respected and Mileena was proudly bearing his features more or less...

This is only speculation. I do not believe it is the truth, but I think it could be possible.

Mileena never was angry about her face. At least she doesn't seem so to me in Deception's konquest.

*Quoting Mileena*
"Do not underestimate me because I am beautiful"

And she also says proudly:

"...Us the Tarkatans..."

meaning she isn't ashamed of her 'tarkatan features'.
If you read her bio, she doesn't speak as if she was ashamed.
What we know is that she does know, by the time of Deception, that she's the creation of Shang Tsung's sorcery. Whether she knew it at birth, a little later or recently isn't important, because that doesn't mean she would've told Kitana. She is loyal to Shao Kahn in a first place: she was meant to be a more violent and loyal Kitana... Actually, what I love about Mileena, is that she's no one of her own, she's just a hybrid of two already existing person.

And about Baraka... I always thought people who said Mileena felt lonely and Baraka was the only one to understand her was pretty lame imo.
Baraka is said to be the leader of the Tarkatans. He must be leading some tarkatans. Mileena probably felt as the most beautiful takatan of all, in the same way Kitana felt as very beautiful.