Erufu Elfuda is the main character of the manga and anime series 'Elf-san wa Yaserarenai' (Plus-Sized Elf). She is an elf who comes to the human world seeking help to lose weight, which she gained from indulging in too many human foods such as French fries. Elfuda is cheerful, earnest, and a bit naive, often getting into humorous situations as she tries various diet methods. Her journey explores themes of self-acceptance and body image in a comedic and lighthearted way.