Black☆Star Part in the Story-Prologue

Black Star defeats Mifune in their first match.

Black Star first appears with Tsubaki on a mission to take down Alcapone and his men. Although Tsubaki reminds him of the Way of Assassination, Black Star ends up giving himself away by making a big entrance right in the middle of the villains' banquet, using Tsubaki in Weapon form like a microphone, much to the Weapon's chagrin. Alcapone's men do not hesitate to attack them, and the two are forced to retreat using Tsubaki's Smoke bomb Mode.

Tsubaki is saddened by their failure, saying that they had not been able to acquire a single soul as of yet, but Black Star remains ecstatic, claiming that he was as 'big as usual' and made a great stage performance. The two contact Shinigami and Tsubaki tells them of their failed mission. Shinigami wonders on why they are failing so much even when they are quite skilled. Black Star interrupts and promises to turn Tsubaki into a Death Scythe, and offers him his autograph as a current substitute, which earns him a chop to the head by Shinigami.

Shinigami then tells them that although he would like to watch over them all the time, things have become problematic recently because Alcapone and his men have begun to go after a Witch Soul of the Witch Angela Leon. He also tells them that Angela has an incredibly strong bodyguard called Mifune and that his soul is more powerful than the average human's. His soul alone will count as ninety-nine souls. Realizing that Mifune's soul and Angela's Witch Soul would immediately turn Tsubaki into a Death Scythe, Black Star eagerly dashes off to face Mifune, with Tsubaki following behind, not waiting to listen to the rest of what Shinigami has to say about Angela.

Tsubaki however, stops Black Star and tells him that in their current state, it would be impossible to defeat Mifune and Angela. They would need to go through this mission properly. Angered by her criticism, Black Star attempts to prove to Tsubaki that he can easily follow the Way of Assassination, by sneaking up on Tsubaki whilst she is bathing at a waterfall. He manages to do it at first, but then ends up screaming when he sees her naked body, which causes an angry Tsubaki to throw a shuriken at him.

As the two make their way to Magic Castle Cinder where Angela and Mifune reside, Tsubaki asks Black Star if he has a plan. He confidently replies that the first thing he will do is make a big entrance, much to Tsubaki's despair. However, Black Star then swears to Tsubaki that he will make her into a Death Scythe, and she smiles and says that she knows he will.

However, as they reach the castle, they see Alcapone's men killed, and they are attacked by Mifune. Mifune asks them if they are after Angela. Black Star introduces himself to Mifune and declares a duel with him as he thinks he is quite strong. Mifune gives the two a chance to leave, but Black Star orders Tsubaki to change into Chain Scythe Mode. Noticing that Black Star is a person from Shibusen, Mifune prepares to attack, engaging in his Infinite One-Sword Style.

Mifune quickly proves to be more than a match for Black Star, as the Meister struggles against his swordsmanship. Mifune says so to Black Star, that his Weapon is the only thing protecting him, and that no matter how potent a Weapon is, if its Meister is not competent, it will be useless. He gives one last chance for Black Star to leave, saying that he does not like to kill a child. However, Black Star, angered at Mifune for calling him a child, proceeds to attack Mifune by throwing Tsubaki at him in Shuriken Mode, followed by Smoke bomb Mode, and then attempts to cut Mifune under cover of the smoke by grabbing one of his katanas. However, his loud voice gives him away, and Mifune strikes him down.

Tsubaki watches on, horrified, thinking Black Star is dead. However, the Meister gets up, and yells at Mifune for hitting him with the back of his blade, saying that only he can do those kind of moves. Mifune instead says he feels sorry for Tsubaki, as she has to put up with him. He calls Black Star a 'small kid.' However, Tsubaki defends Black Star, saying that he can succeed if he tries, despite being a bit of an idiot at times. Black Star, now furious at Mifune, accuses him for trying to stand out more than him, and declares that the main role will always be himself. Deciding to take the fight seriously, he successfully follows the Way of Assassination. By covering himself with Tsubaki's Smoke Bomb Mode, he uses Tsubaki's Dummy Star Mode to distract Mifune, before taking down Mifune with one hit using his Certain Kill: Black☆Star Big Wave. As Mifune is defeated, Black Star states that it obvious he lost to someone as great as him.

He proceeds to interrogate Mifune on the whereabouts of Angela. Mifune refuses to say anything and Black Star is about to lose his patience when Angela herself arrives and begs the two to spare Mifune. Black Star is startled as Angela is only a small child, and that Mifune is defending her until she can fend for herself. Mifune tells Black Star that he can take his soul, but he would fight to the death for Angela. In the end, Black Star does not kill the two, repeating Mifune's words as he leaves, that he would not like to kill a child.

Back at the DWMA, Black Star gives all of Alcapone and his mens' souls to Shinigami, who asks him why he is not taking them when the going is good. Black Star declares that someone as great as him has no need to take credit for someone else's work. He asks for Tsubaki's opinion and she happily agrees.

Later however, Black Star is back to his old tricks again, peeping on Tsubaki in the school baths, which earns him a shuriken thrown into his head.

Soul Eater Maka Albarn Part in the Story-Prologue

The series begins when Maka and Soul Eater are soul hunting at night in the dark streets when they cross paths with Jack the Ripper and engage him in a battle, in which they are victorious. After defeating the Evil human, Soul eats Jack the Ripper's soul, the souls of Evil humans being necessary for Soul's possible upgrade to Death Scythe. Since this is their ninety-ninth Evil human soul, Maka is very close in making Soul into a Death Scythe.
They contact Shinigami and are informed that Soul Eater must consume a single Witch Soul before he can be upgraded into Death Scythe (Witch Souls being the hardest to obtain). Shinigami reminds them that if they consume a soul that is not a Witch Soul, they will have to start collecting ninety-nine Evil human souls all over again. During the conversation between them and Shinigami, Spirit, Maka's father, also appears, and warns Soul to keep his hands off of his daughter. Soul replies coolly that he is not interested in girls like Maka who lack physical attractiveness, which enrages both Maka and Spirit. Spirit tries to be friendly towards his daughter, who rejects him almost immediately, much to his despair.
Maka and Soul's quest for the Witch Soul takes them to a pumpkin-shaped house which they believe to be home to Blair the Witch, a woman with purple hair and magical powers. Although Maka tries to have Soul follow a set plan, her partner disobeys her and crashes through the window of Blair's house, eager for his next meal. However, he finds out that he had crashed into her bathroom, and that Blair is having a bath, and he ends up getting a nosebleed after landing into the bath with Blair. Maka, angered by his actions, kicks him across the bathroom before confronting Blair. They try to fight Blair, but she easily blows them away with her Halloween Cannon. The pair try fighting her again numerous times, but their plans usually end with Blair using her Halloween Cannon on them, or by sneaking up on Soul and giving him a nosebleed again.
Finally, they are able to engage Blair in a proper battle. Maka, now annoyed with Soul's constant nosebleeds, argues with him, which prompts Blair to ask Soul to become her Weapon instead, since she will not complain to him at all. Maka tells her to stay away from Soul and that he is her partner. However, Soul is silent throughout the battle after Blair's proposal, not responding to Maka. When she starts struggling in holding her own against Blair, Soul suddenly declares himself as Blair's new partner, saying that he prefers Blair because she is physically superior to Maka. Maka at first believes that Blair had put a spell on Soul, but soon realizes and is deeply upset. However, she then sees that Soul is only tricking Blair, and using the opportunity, the two manage to defeat her. Maka thanks Soul as he devours his final soul, and prepares to become a Death Scythe. However, all he manages is a belch, much to Maka's disgust. To their horror, they find that Blair is not a Witch, but a mere cat with magic powers. They find that they must start their soul hunting all over again. Forlorn, the two ride away on Soul's motorbike, with Blair following. Maka asks her why she is still alive, and Blair replies that cats have more than one soul, and that Maka and Soul had only succeeded in getting one of them. Maka crossly tells the cat to stop following them.
Maka and Soul later meet with Black Star and Tsubaki in the DWMA after their failed mission against Alcapone. After exchanging greetings, Tsubaki asks them how Maka and Soul are doing and the two become depressed, as Maka asks her not to remind them of their failure as they get depressed just thinking about it.
Maka later sees Tsubaki and Black Star disagreeing with each other outside through a window in the classroom. She wonders why Tsubaki had become Black Star's partner when she could have chosen anyone else. Soul tells her that although Black Star may be an idiot, he has guts, and that Tsubaki must know that he is not all talk. Maka smiles in agreement as she watches the two from the window. Soul suggests that they should get to work soon as they must start over in making a Death Scythe. Maka agrees.
After, Maka is with Soul, Black Star and Tsubaki as they observe that someone had taken an exceptionally hard mission for the DWMA. This mysterious Meister is a subject of much talk in the school. Soul, along with a jealous Black Star, eagerly dash off to find who it is. Maka and Tsubaki go to class, and wonders on what the two are doing.