Baskerville notices how the bullet hopped around like a rabbit before hitting the bandit, and believes this gun is something special.
Thus begins a journey that reveals the many mysteries of the Eto gun, a weapon that uses the "essences" of the twelve animals of the Chinese zodiac to fire its bullets.
It doesn't take long for it to catch the attention of bandits and criminals, and most notably the Syndicate, an underground organization that deals in narcotics.
As Mingchao learns more about the Eto gun, it becomes apparent this family heirloom has a dark history, and so she travels across the country to discover the truth behind its creation.
Along the way, she and Baskerville befriend a fanatic gun collector, two Native Americans, and an enemy turned ally.
Her grandfather created the mysterious Eto gun, which she can fire with the number XII that was accidentally branded on her palm when she was younger.
She is also incredibly fortunate to where Benkate has dubbed her as having the "Devil's Luck" due to her ability to narrowly avoid death or injury.
This stems from her belief that it is sad whenever someone dies, and that killing someone would make her as bad as the murdering scoundrels she frowns upon.
She was so ecstatic when he showed the first signs of remembering her that she didn't care that she was falling several dozen feet into a stormy, raging ocean, and she cried happy tears when they were reunited.
It is implied several times that she may have romantic feeling towards him despite their obvious age gap, as pointed out by other characters such as Benkate and Luriele.
When it became clear how many lives were being ruined by the Syndicate, Mingchao and her friends started trying to find a way to stop it.
Mingchao, appalled that she shared this man's blood, grew enraged by his callous referrals to all the misery he caused.
Her rage and sadness only amplified when Gothic, discovering his daughter didn't agree with him, mercilessly attacked her comrades.
Desperate to stop him, Mingchao, with Baskerville's help, shot him with the Eto gun's powerful dragon bullet and he fell to his death.
At the series' end, Mingchao goes off to continue following her dream of achieving stardom, and to her great joy, Baskerville decides to join her.
When it is shown that his "Bible" actually carries information on the Eto gun, it becomes obvious his goals are much darker than those of a simple missionary.
It is later revealed his real name is Razy (レイジー, Reijii)} and he had been a member of The Syndicate, a shady organization that sells drugs and seeks to gather unique guns.
It is later shown that Baskerville lost his parents at a young age, leaving him to care for his younger sister, Chisel, whom he doted on.
However, the medicine he was receiving turned out to be a dangerous narcotic that if abused could over time rot the body from the inside out.
He begins following even the most dangerous of Blush's demands to get the "medicine", such as picking up a heated Eto gun from a burning furnace.
In the final battle he is given a powerful dose of opium to numb the pain of his injuries so he can help Mingchao.
But when Fino's parents refused to talk about the tribe's sacred treasure, Blush proceeded to murder them in cold blood with his guns, leaving the two children orphans.
After that, she grew bitter and developed a hatred for guns and white men, thinking that no one could be trusted except her own people.
An omake drawn by one of Nakazaki's assistants shows that Yaghi dreams of one day making Benkate his wife, though he fears his sister wouldn't approve.
Yaghi is also incredibly brave for his age and is willing to do anything for people he cares about, though this causes worry for Fino since it puts him at risk of being hurt.
A testament to his bravery is how he willingly stayed behind with Benkate to help her hold off a band of hooligans in order to let Mingchao and the others get away, despite the danger it put him in.
At the end of the story, an omake by one of Nakazaki's assistants jokes that Blush was killed by the giant energy wave created by the Eto gun's dragon bullet.
She at first appears to be an authoritative figure with the ability to hold a stern hand over her peers, but she is sadistic, calculating, and controlling.
He wants to rule all of the United States in revenge for the death of his wife, Mingchao's mother, who died because she couldn't get proper medical treatment as a Chinese immigrant in America.
He bleached his hair, damaged his vocal cords to change his voice, and wore a mask to disguise that he was actually Chinese.