If you're looking for something other than LitRPG Adventures, Spawn is another option. This AI tool is geared for Dungeons & Dragons (D&D) enthusiasts, letting you generate characters, campaigns and enemies. It can create full characters in less than a minute, with ability scores and other details, and can also generate campaigns and enemies, which is useful for paring down D&D prep work so you can focus on the fun part of the game.
Another tool to consider is StoryNest.ai, an AI-powered storytelling platform. It's got a variety of tools to help you create stories, novels and interactive stories. With character creation, world-building, AI-assisted editing and proofreading, you can create stories in multiple formats, including short stories, novels, interactive fiction and scripts. The tool also lets you collaborate with AI and other writers, so it's good for writers at all levels.