I'm not entirely sure as there could be many different themes in a Kocho Visual Novel. It might be about the adventures of a character named Kocho, or it could revolve around a fictional world with its own set of rules and stories.
Perhaps it has unique art styles. Visual novels often have distinct visuals, so Kocho Visual Novel might stand out with its own kind of character designs or background scenery.
A common theme is the clash of different power systems. For example, when Shinobu crosses over into a world like 'Fullmetal Alchemist', her demon slaying powers contrast with the alchemy in that world.
One popular 'shinobu kocho crossover fanfiction' is the one where she crosses over with the world of 'Harry Potter'. In this fic, Shinobu's skills as a demon slayer are put to the test in the magical world. She might have to face new types of 'demons' in the form of dark wizards.
Well, 'Hello Kitty' could be considered. Although it's not a traditional cartoon with a storyline, it's a very popular and classic image of a cute cat. Also, 'Felix the Cat' is an old one with Felix getting into all sorts of adventures.
Start with basic shapes for the head and body. Then, add details like the facial features and clothing. Pay attention to proportions and use simple lines.
Political cartoons in news often have simple but powerful images to convey complex ideas. They can have a big influence by making people think and start discussions about important issues.