Question: How did the parody appear in Mulan?
About the article "American Gothic", section "Parodies".

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 Fa Zhou is Mulan's father who is very strict and also a famed war veteran.
At first glance he seems like he only cares about the honor of the family and that he is quick to frustration with Mulan.
He first appears putting an incense stick on the hanging dish and praying to the honorable ancestors while Mulan is seeing the matchmaker.
Nothing distracts him from his prayers, even when chickens go running around in the shrine crazily to devour the chicken feed.
When Chi-Fu calls him from the Fa family for military duty, he puts down the cane, stands straight and accepts his assignment scroll, not caring about his old crippled body despite his limping and visible pain.
Mulan worries that he is risking his life, especially after seeing him collapse after some sword exercises.
When Mulan returns in triumph of defeating Shan Yu, she gives him Shaun Yu's sword with the blade wrapped in cloth and the crest of the emperor; the two gifts that honor the Fa Family.
On receiving these gifts, he immediately throws them down and confesses that all he ever wanted was Mulan to be happy and safe, informing her that his greatest honour is having her as a daughter.
He was voiced by Soon-Tek Oh.
Fa Li is Mulan's mother.
She initially stays with the dresser waiting for Mulan to come.
She is furious when her daughter's hair is freckled with hay and sends her inside to clean her up.
She and all the dressers help her get dressed after a bath.
After they have finished beautifying Mulan, she sends her to the impatient matchmaker who then gets angry by Mulan's accidents.
Fa Li consoles her after the matchmaker rejects her.
During the rainy night, she weeps for her daughter who runs away with Khan the horse, and her husband Fa Zhou consoles her while watching over her at the same time.
According to her second film, the only child she likes is Sha-Ron (a faux-Chinese version of the name Sharon), a little girl who wears a lavender outfit and ox-horns.
She was voiced by Freda Foh Shen.
Grandmother Fa is Mulan's grandmother.
She is very easy-going and gives Mulan the most freedom.
She also provides comedic relief in the family.
She is first seen holding a cage with Cri-Kee in it.
She covers her eyes while crossing a road and demonstrates the ability to show how lucky this cricket is.
After Fa Li and all the dressers have finished beautifying Mulan, Grandma Fa gives her a few things to make her look perfect.
She constantly encourages her to find a husband.
During the rainy night, she recognizes that her granddaughter has run away to join the army in her father's place, and she picks up the lantern.
When Mulan returns home with Shan Yu's sword and the Emperor's crest, she comments that Mulan should have brought a man home and is shocked when Li Shang arrives, causing her to jokingly say to sign her up for the next war.
When Mulan asks Shang to stay for dinner, she asks him to stay forever.
In her second film, she plays a game in the house of Fa and brings in food for the perfect couple Mulan and Shang.
Her speaking voice is provided by June Foray and her singing voice is provided by Marni Nixon.
First Ancestor Fa is the eldest member of the Fa family and acts as leader of the ancestors.
He carries a staff with him.
When he is summoned, he brings Mushu to life by saying the word "awaken".
He usually stops the other ancestors from fighting and requests (what he thinks are) better plans such as summoning the Great Stone Dragon.
When Mushu returns with Mulan, he gives him his job as a guardian again, though showing a frustrated face.
In the beginning of his second film, he performs something interesting with the forming of smoke.
He was voiced by George Takei.
Other Ancestors, members of the company including the farmer and his wife (a parody of the famous painting American Gothic), and the counter who is always fiddling with his instruments.
Fa Deng is the only ancestor whose head is cut off, a result of Mushu when he was a guardian.
Many of these ancestors clamor about Mulan when she's away.
Mary Kay Bergman did the voice of the female ancestors in the first film and in the second film, they are voiced by Tress MacNeille.  
 Reflection (Mulan)  
Mulan or Hua Mulan is a legendary figure from ancient China said to have taken her father's place in the army.
Mulan may also refer to: 
Appearances.
The Huns, led by Shan Yu, invade Han China, forcing the Chinese emperor to command a general mobilization.
The emperor requires one man from each family to join the Chinese army.
When Fa Mulan hears that her elderly father Fa Zhou, the only man in their family, is forced to join the army, she decides to stand in his place, disguising herself as a young man named "Ping".
Fa Zhou learns that Mulan has taken his place and prays to his family's ancestors, who order their "Great Stone Dragon" to protect her.
The ancestors are unaware that the statue of Great Stone Dragon failed to come to life, and that Mushu, a small dragon is the one to go and protect Mulan.
Mulan is initially misguided by Mushu in how to behave like a man.
However, under command of Li Shang, she and her new friends at the camp, Yao, Ling and Chien-Po, become skilled warriors.
Mushu, desiring to see Mulan succeed, creates a fake order from Li Shang's father, General Li, ordering Li Shang to follow them into the mountains.
They arrive at a burnt-out village and discover that General Li and his forces have been wiped out by the Huns.
As they solemnly leave the mountains, they are ambushed by the Huns when Mushu accidentally fired a cannon causing their position to be given away, but a second firing of a cannon by Mulan buries most of the enemy forces in an avalanche.
Mulan is slashed by Shan Yu in his rage at her wiping out his army during the battle, and she is forced to reveal her deception when she receives medical attention.
Instead of executing Mulan as the law requires, Li Shang decides to spare her life by leaving her on the mountain as the rest of the army departs for the Imperial City to report the news of the Huns' demise.
However, the avalanche failed to eliminate all the enemies, as Mulan catches sight of a small number of surviving Huns, including Shan Yu, making their way to the City, intent on capturing the Emperor.
In the Imperial City, Mulan attempts to warn Li Shang about Shan Yu, but he refuses to listen.
The Huns appear and capture the Emperor, locking themselves inside the palace.
With Mulan's help, Li Shang, Yao, Ling, and Chien-Po pose as concubines and are able to enter the palace and defeat Shan Yu's men.
As Shang prevents Shan Yu from assassinating the Emperor, Mulan lures the Hun onto the roof where she engages him in single combat.
Meanwhile, acting on Mulan's instructions, Mushu fires a bundle of fireworks rockets at Shan Yu on her signal and kills him.
Mulan is praised by the Emperor and the people of China, who all bow to her, an unprecedented honor.
Mulan accepts the Emperor's crest and Shan Yu's sword as gifts, but politely declines his offer to be his advisor and instead asks to return to her family.
She returns home and presents the imperial gifts to her father, but he is more overjoyed to have his daughter back safely.
Li Shang, who has become enamored with Mulan, soon arrives under the guise of returning her helmet, but accepts the family's invitation for dinner.
Earlier in the film, Mulan was declared unfit for marriage, but this now appears not to be the case with her strong budding romance with Li Shang.
Mushu is granted a position as a Fa family guardian by the ancestors amid a returning celebration. 
The story of Hua Mulan is well known in Chinese literature.
Another musical adaptation of her story is the 1998 Disney cartoon, "Mulan".