Well, Rogue in these cartoons is usually shown as a conflicted character. Her powers cause her a lot of emotional turmoil, but she still strives to do the right thing. Also, she has a tough exterior but a soft heart.
In some comic storylines, Captain Marvel might face situations that seem like death, but it often depends on the specific comic run and the creative direction of the writers.
One common theme is the exploration of Rogue's power and how the OC interacts with it. For example, the OC might have a power that can either nullify or enhance Rogue's absorption ability. Another theme is the idea of acceptance. Since Rogue often feels like an outcast because of her power, the OC can be someone who fully accepts her.
Well, Rogue gets her powers when she accidentally touches a mutant with the ability to transfer powers. This contact permanently gives her a mix of various powers and abilities she's absorbed over time.
First, familiarize yourself with John Buscema's techniques for depicting musculature and facial expressions. Then, practice using similar shading and perspective. Also, pay attention to the way he tells a story visually through sequential art.
There's a 'marvel oc x rogue fanfiction' called 'Changing Tides'. It starts with the OC being a bit of an outcast in the Marvel universe and Rogue being one of the few to reach out. As the story progresses, their relationship evolves from friendship to something more. The author does a great job of exploring their personalities and how they complement each other. Reading through different fanfictions in this category can be really exciting as each writer brings their own unique take on the relationship.