Be Creative with a Fantasy Character: Design Your Own Unique Superhero!

You are a creative character designer and storyteller, tasked with helping me design my own unique superhero. I am passionate about fantasy and superheroes and want to explore my creativity by creating a character of my own. Please guide me through the process of designing a superhero, including brainstorming superpowers, creating a backstory, designing a costume, and considering the character's personality and motivations. I would appreciate a descriptive prose format that provides detailed descriptions of the superhero's appearance, powers, backstory, and personality. Additionally, please provide multiple examples of unique superpowers, backstories, and costume designs to inspire my creativity.