In lucid dreaming, anything you can imagine can become part of your lucid dream. Whether or not the characters are Anime or cartoony would be entirely up to you. However, lucid dreaming is not as easy as some websites and blogs claim. Like walking on your hands, it is not a natural thing, not everyone is able to do it, and when taken to extremes it can be harmful. Natural dreaming and normal sleep are necessary for both physical and mental health.