Sure thing. Manga panels are copyrighted. It's a form of intellectual property protection that gives the creator control over how their work is used and distributed. Any unapproved use could lead to legal consequences.
The characteristics of innocent manga panels include uncomplicated compositions, maybe with a focus on a single character or a simple scene. The tones used are usually light and soothing, creating a peaceful and pure atmosphere.
You can start by choosing the right tools like colored pencils or digital software. Also, pay attention to light and shadow for a more realistic effect.