The curse of the Luo family was to protect Luo Zhaoyan by sacrificing the lives of the other members of the family in order to break the curse of the twins. Luo Mingmei used the entire Luo Clan (excluding Luo Zhaoyan) and his own death to remove the curse, allowing Luo Zhaoyan to live a normal life. The specific method to break the curse was not mentioned.
Well, it could be that after all the adventures in the digital world, they realized how much they relied on each other. Takato was always there for Rika when she was in trouble, and Rika admired Takato's courage. Over the years, this mutual respect and admiration grew into love. They decided to get married as they wanted to be together forever, to face any future challenges as a couple in both the real world and the digital world.
Camilla had turned black during her relationship with Ultraman Diga. Camilla was Ultraman Diga's lover, but because of love, she eventually fell into darkness and became a dark giant. Diga seized the power of Camilla and the other two dark giants and sealed them. When the seal was lifted, Camilla turned dark. Before the Dark State, Camilla was a righteous giant of light, but due to the darkness in her heart, she had fallen into a dark giant. The turning point of her blackening was in the battle with the evil forces. Her power was eroded by the evil forces and she gradually lost herself, becoming cold and heartless. She only had one goal, and that was to destroy all evil beings.
The reason why Camilla turned dark was because of the love-hate relationship between her and Diga. Camilla was Diga's lover 30 million years ago. She was originally a righteous giant of light. However, due to the darkness in his heart, he had fallen into a dark giant. Diga seized the power of Camilla and the other two dark giants and sealed them. When the seal was lifted, Camilla turned dark. Although the specific process and reason of the dark side was not explained in detail, it could be speculated that Camilla's dark side was related to her love and hate for Diga.
Well, one theory is that a genetic mutation occurred within the crow population, leading to the black coloration. This mutation might have provided some advantage, causing it to become more common over generations.
It probably originated from the rich folklore and mythology about jinn in Islamic culture. The idea of a curse might be added to make it more of a horror concept.
Naruto could develop by learning to adapt his ninja skills to a more modern and zombie - filled setting. He might become more cautious as he realizes the different threats here compared to his ninja world. Rika could develop from being a normal schoolgirl to a more confident and brave fighter. She could learn from Naruto's fearless attitude and start using her own wits in more daring ways.