Sorry, I don't have the exact manga in mind. You might need to search through specific manga genres or check popular manga review sites for that information.
In the Lion King Mufasa and Taka story, Taka's transformation into Scar is likely a result of a combination of factors. He was probably always a bit of an outcast or had a sense of inferiority compared to Mufasa. An incident occurs that gives him a scar on his face. This physical mark becomes a symbol of his bitterness and his new identity. It's possible that the scar was obtained in a territorial fight or during some sort of power struggle within the pride. After getting the scar, he becomes more embittered and resentful. His appearance changes, and so does his attitude. He starts to plot against Mufasa, and with his new scar, he is no longer just Taka but is now known as Scar, a name that strikes fear and represents his new, more devious self. As Scar, he is more conniving and determined to take over the throne from Mufasa, using his new - found identity as a sort of shield and weapon in his devious plans.
Well, Jeff the Killer is a creepy character known for his pale face and carved smile. Jane the Killer has her own backstory related to Jeff. In their story, they have a long - standing feud. Jeff is this deranged killer, and Jane, who has her reasons, wants to take him down. Basically, it's a dark battle between two really disturbing characters in the horror lore.
Taka is actually Scar in the Lion King story. He's the one who caused a lot of trouble in the pride. He was jealous of Mufasa and his power, so he did bad things to try and take over.
The exploration of their abilities in new ways. Fem Naruto might have different ways of using her powers compared to male Naruto. When paired with Killer B, they can come up with innovative combat strategies. Also, their cultural differences, with Naruto from Konoha and Killer B from the Hidden Cloud Village, can add depth to the story as they learn from each other.
There are fanfictions where Fem Naruto and Killer B meet during a journey. For instance, Naruto is on a quest to discover more about her new - found femininity in a world that has always known her as male. Killer B, with his wisdom, helps her understand and accept herself. This type of story often delves deep into character development and the relationship between the two.
One interesting story could be where the OC is a healer who meets Killer B during a battle. The OC tends to Killer B's wounds and from there, a slow - burn romance develops. They start to learn about each other's cultures and values, which deepens their connection.
Taka, or Scar as we know him in 'The Lion King', was a complex character. He wasn't born evil but his insecurities and the way he was treated in the family, perhaps not getting the same level of attention as Mufasa, drove him to the dark side. He allied with the hyenas, who were not the most noble of creatures. His actions not only cost Mufasa his life but also brought great hardship to the lion pride. The land suffered under his rule as he didn't care about the well - being of the others. However, his story serves as a cautionary tale about the consequences of envy and the thirst for power.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can use the search function to specifically look for Killer B and OC romance stories. Just type in 'Killer B and OC romance' in the search bar.