The Centurion lent Doctor Who his ear since he had saved the Centurion's life.

Who is "he" in this prior sentence?
Doctor Who
The nurse gave the girl a lollypop so that she would stop crying.

Who is "she" in this prior sentence?
the girl
To save the world, Liu Kang must defeat Shang Hai in mortal combat, since he would be able to invade the world if he is not defeated.

Who is "he" in this prior sentence?
Shang Hai