Enju Aihara is a key character in the anime series Black Bullet. She is a young and energetic girl known for her spirited personality and exceptional combat skills. Enju is a Cursed Child, possessing extraordinary abilities due to the Gastrea virus. As Satomi Rentarou's partner, she plays a crucial role in battling the monstrous Gastrea creatures that threaten humanity. Despite her young age, she exhibits remarkable bravery and determination, often supporting and protecting those around her. Her character explores themes of prejudice and acceptance within the post-apocalyptic setting of the series.