TV-Series
Description
Enju Aihara is a ten-year-old girl and one of the central characters from the series Black Bullet. She is known as an Initiator and a Cursed Child, meaning she carries the Gastrea virus in her blood, which grants her superhuman abilities but also subjects her to severe societal prejudice. Her physical appearance is distinctive, featuring long crimson hair typically tied into two long ponytails with large, black rabbit-themed hair accessories. She has red eyes, a trait common among Cursed Children, and is of small stature. Her typical outfit includes a hooded orange sweater over a white dress, and she is almost always seen wearing a pair of heavy boots made of varanium, a metal effective against the Gastrea.

In terms of personality, Enju is generally cheerful, lively, and remarkably resilient. Despite the constant danger and the discrimination she faces, she maintains a positive outlook and tries to live her life like any ordinary girl her age, enjoying activities like attending school and watching her favorite anime, Tenchuu Girls. She has a playful and sometimes mischievous side, often displaying jealousy when her partner and caretaker, Rentaro Satomi, receives attention from other girls, particularly his childhood friend Kisara Tendo. Enju refers to herself using the archaic and self-aggrandizing term "warawa" (妾), which adds to her unique charm. Underneath her bright exterior, she carries a heavy emotional burden, feeling deep pain when she or other Cursed Children are mistreated by the very society she risks her life to protect. She is fiercely loyal and has a strong sense of justice, believing strongly in protecting innocent people.

Enju's primary motivation is to protect others and to be useful to Rentaro, whom she deeply admires and loves. She is driven by a desire to see a world where Cursed Children like herself can live normal lives without fear of persecution. Her role in the story is that of Rentaro's partner in the Tendo Civil Security Corporation. Together, they form a pair typical of their world, with Enju as the Initiator, the one who fights using her physical enhancements, and Rentaro as the Promoter, who supports and directs her. She is the story's deuteragonist, and most of the plot's conflicts are seen through her relationship with Rentaro.

Enju's key relationships are central to her character. Her bond with Rentaro Satomi is the most important. He took her in from the International Initiator Supervising Organization, where she had initially been distrustful of humans. Living with him and receiving his care and acceptance slowly opened her heart. She is deeply in love with him, often seeking his affection and viewing Kisara Tendo as her primary romantic rival. She also forms a significant friendship with Tina Sprout, another Initiator who was initially an enemy. Despite being severely injured by Tina in their first encounter, Enju's forgiving nature allows her to not only pardon Tina but also become close friends with her. Enju also cares deeply about her peers at school, although she must hide her true identity to be able to attend.

Throughout the story, Enju experiences notable development. She begins as a girl with severe trust issues towards adults and humans in general, a result of her past trauma and the treatment of Cursed Children. Her relationship with Rentaro gradually helps her learn to trust again. A pivotal moment in her development occurs when her identity as a Cursed Child is publicly revealed, leading to her ostracization at school. This forces her to confront the full weight of societal hatred firsthand, a painful experience that tests her resilience. Despite this, she does not become bitter, instead vowing to continue fighting for a better future. An ever-present part of her development is the tragic countdown of her Gastrea virus erosion rate, which is slowly progressing toward the 50% threshold, after which she would transform into a monster. This looming fate adds a layer of tragedy to her otherwise spirited character, as both she and Rentaro are aware that her time is limited.

Enju possesses notable abilities that stem from the rabbit Gastrea factor within her. This grants her immense leg strength, incredible jumping power, and phenomenal speed that is difficult to track with the naked eye. Her fighting style revolves entirely around powerful kicks, utilizing her specially made varanium boots as both weapons and shields. She has demonstrated the ability to shatter steel, deflect large-caliber bullets with her kicks, and launch massive Gastrea creatures dozens of meters into the air. She is considered a highly skilled and powerful Initiator for her age, though she is not yet among the absolute elite in terms of ranked power. Her abilities come at a cost, as using her full strength accelerates the erosion rate of her virus, bringing her closer to her eventual transformation.