No one should desire to go to war
Among the first words uttered by Hua Hu is that in war no one is a hero and no one should desire to go fight in a dangerous war. Hua Hu gives a speech on this subject in the middle of the village while the rest of the men listened entranced by him. Because of this, it is ironic to see how Hua Hu was among the first ones to jump on the opportunity to go and fight in another war.
Not ruining to safety
When the camp is attacked by the Rourans, Mulan is set free by Wentai who tells her to run as far away as possible to save herself. If Mulan were to run away, she would have most likely saved her life and be able to return home. Ironically, even though he battalion commander sentenced her to be executed the previous night, Mulan decided to return and fight side by side with the rest of the men.
She will no longer be killed
After the Rourans are defeated at the camp and both commanders are killed, the man who takes charge of the troops is Wentai. He approaches Mulan soon after the battle and offers her the position of second in command, an honor unimaginable for many. This proposition is an ironic one, mainly because Mulan was a woman, someone who was not expected to have any military skills, but also because Mulan was sentenced to death the day before by the very institution she was asked to serve.
Being showed kindness by those whom he bullied
The character named Turtle is described at the beginning of the film as an extremely vain and impulsive man. Turtle is related with the commander and he believes that his close connection with him will save him from troubles. Also because of his position, Turle bullies the other soldiers around him, treating them like dirt. Ironically, after his uncle dies and he remains on his one, the ones who comfort him and those he bullied in the past.
Proud
After Mulan fought on the battlefield for 12 years, she asks the Emperor to be allowed to return home and take care of her aging father. The Emperor agrees and Mulan returns home. Mulan is afraid she will be reprimanded by her father but instead he is proud of her and happy to have his daughter back home. Ironically, the father is forced to admit his ideas about women and their capabilities were wrong and Mulan was more capable he gave her credit.