I'm not sure exactly when Leen gets engaged to Toya in the manga. You might need to check the latest chapters or refer to dedicated manga forums for the most accurate information.
I'm not that familiar with her, but she must be the central figure in this story. Maybe she was someone who went through an extraordinary event related to judgment.
Ellie could be a new superhero in training. Maybe she has some sort of power related to energy manipulation. She looks up to Peter and Wade and wants to learn from them. So she gets involved in their adventures and gradually becomes an important part of their team.
Well, in a story like 'Ellie's Story: A Dog's Purpose Novel', apart from Ellie, the main characters could be the people she lives with. They would be the ones who take care of her, train her, and form a deep bond with her. There might also be some antagonists, like people or animals that pose a threat to Ellie or her family. This would add conflict to the story and help in exploring Ellie's purpose further.
The main distinction of porn with a story genre from regular porn is the presence of a coherent narrative. Regular porn often jumps straight to the sexual action, while the story genre tries to add some kind of story framework around it. But in the end, both are adult-oriented and feature explicit sexual content.