Typically, the decisions about who lives, who dies, and who tells the story in an animatic are made by the team of writers and animators. They consider various factors such as character arcs, the overall theme, and the intended impact on the audience.
You can try searching on popular image-sharing websites like Pinterest or Unsplash. They often have a wide variety of cartoon clip art, including happy mouse ones.
Contemporary political cartoons often directly address the hot topics and controversies of the moment. They use satire and imagery to draw attention to the key issues and offer a critical perspective.
It's inappropriate and likely not in line with the intended image of the character. Such content is usually unauthorized and goes against the original concept.
Common acronyms in English manga include 'MC' for 'Main Character', 'OVA' for 'Original Video Animation', and 'FPS' for 'Frames Per Second' when referring to the animation quality. But it really depends on the specific genre and context of the manga.