1.
XuanJi is not transgender. Transgenders are those who chose their gender to be different/changed by will. Luo Hou Ji Du is an ASURA. Asuras can choose their sex whenever they want but Luo Hou Ji Du chose to be a man.
You can't say Luo Hou Ji Du and Xuan Ji/God Of War is the same since they were raised differently, with different parents, with different will, with different desires and had no relationship with each other except for their memories and primordial spirit, if only put together.
Xuan Ji was able to come out of Luo Hou Ji Du because of this. Since they are VERY different.
Xuan Ji/God Of War's heart is a crystal.
The crystal was cut to half since Xuan Ji got seperated from Luo Hou Ji Du and Luo Hou Ji Du gave the other half of the crystal to Yu Si Feng(In EP 59).
--- > star of mosha is choose to be a real older man.... what can u say about that ??
2.
However, because of Bai Lin Di Jun, Luo Hou Ji Du was forced to become a woman and his memories were taken from him. And so, he became a God Of War. God does not only refer to man. God could be a women too.
Xuan Ji is a mortal woman. God of war is an immortal who lived in the heaven realm.
Physically and mentally, they are woman.
When God Of War was punished to a 10 lifetime of trials, Xi Xuan decided to help or assist her.
They had no memories of their past selves but they still, again and again, met and at the same time, during those 10 lifetimes, Xi Xuan as a mortal, fell in love with her.
---- > every celestials, demons, humans, has a sex or a gender, god, goddes, etc..... this is story about ancient myth of china, not about superhero comic with genderless in 21th century.... !!!
--- > u can say like that..... but, in another perspective......... no matter how many time reincarnated, xuanji is still has a body of star of mosha, its mean, even xuanji has a body and mentally a woman, but in reality, xuanji still has a body and mentally as a older man from star of mosha.....
--- > You still can't answer the main question that is a problem in this TV series ... why did Xixuan choose to love God of War, even though God of War never loved him and only considered him as a mere friend for more than 1000 years and 10 times reincarnation, but only at eps 48, Xuanji, who is still a transgender female, has just returned her love to Sifeng .....
---- > do u remember of this ??
Obsessive love or Obsessive love disorder (OLD) is a condition in which one person feels an overwhelming obsessive desire to possess and protect another person, sometimes with an inability to accept failure or rejection. Symptoms include an inability to tolerate any time spent without that person, obsessive fantasies surrounding the person, and spending inordinate amounts of time seeking out, making, or looking at images of that person.[1]
--- > 10th tribulations, for more than 1000 years, sifeng trying to change, by all means, the heart of xuanji (god of war), a female transgender to loving him..... although, ever since he first met & became acquainted with god of war (xuanji) in the heavenly kingdom, the god of war (xuanji) never loved him .... !!!