I am currently working on a comic, and I've spoken with a friend of mine if they wanted to participated, seeing that they have a very distinctive artstyle. My idea was to draw the pages of the comic, while they draw a detailed cover for it.

This is qhere I start to have doubts and I am not really sure if this clashes with a specific rule in the Terms of Use. Would it be a conflict against the "Ownership" section if they would be credited, even if I did not create the literal first page of the comic?