喜欢凹凸曼的小怪兽

Translates into 'Little monster who likes Otoman'. '奥特曼'(Otoman)refers to the Japanese superhero series Ultra-Man, so this nickname suggests that the user identifies as an enthusiastic and possibly playful fan of the classic sci-fi series or similar types of entertainment aimed primarily at younger audiences, such as superheroes fighting monsters, or even the idea of embracing a part of them that's a little quirky, unusual or beast-like yet loving and adorable inside.