My husband is the creator/main writer for my secondary MC, Koreal, and I often run story plots involving Koreal past him to make sure I'm not writing the character saying or doing something he wouldn't... but other than that, it's all me. I do everything from plotting, to script writing, to character and set design, to thumbnailing, drawing pages in traditional media with pencils, inks, and coloring with markers, clean up, scanning, photoshop editing, lettering, formatting, posting, and social media.
... no wonder I'm tired. O_o