Choso's cursed technique is Blood Manipulation, inherited from his origin as a Death Painting Womb. He can control his own blood with extraordinary precision, shaping it into high-speed projectiles, dense barriers, and explosive blasts. His most iconic moves include Piercing Blood, a compressed jet capable of breaking the speed of sound, and Supernova, which forms a constellation of blood bullets that detonate simultaneously. Because he is a half-cursed spirit, his blood carries cursed energy naturally, making his technique one of the most lethal in the entire series. Fans frequently rank Choso's Blood Manipulation among the most versatile and visually striking abilities in the story.

This is one of the most discussed and debated moments in the fandom. During the Shibuya Incident arc, Choso experiences a sudden vivid false memory of sharing a meal with his brothers and the protagonist, a memory that never actually happened. This is widely believed to result from the protagonist's unique constitution as the vessel of a powerful ancient curse, whose presence appears to distort memory and perception around familial bonds. The false memory bypasses Choso's rational mind entirely and triggers his deep familial instincts, leading him to abandon his mission and protect the protagonist as a true younger brother. It remains one of the most emotionally compelling and hotly debated plot points in the series, and is a major reason why Choso has such a dedicated fanbase.

Choso begins the series as an antagonist, allying with cursed spirits to avenge his slain brothers Eso and Kechizu. However, he undergoes one of the most significant redemption arcs in the story, transitioning into a powerful and fiercely devoted ally of the protagonist. His motivations have never actually changed; he has always been driven entirely by love for his brothers. It is simply that his definition of family expands to include the protagonist. Fans frequently rank Choso among the best-written characters in the series precisely because his shift from villain to ally feels emotionally earned rather than forced. The Choso plush has become a popular collector's item partly because of how deeply fans connect with his arc.

The Death Painting Wombs are nine hybrid beings created centuries ago by a disgraced sorcerer who repeatedly impregnated a woman who could perceive cursed spirits and then aborted the fetuses, imbuing them with cursed energy. The resulting entities exist in a state between human and cursed spirit. Three of them, Choso, Eso, and Kechizu, are awakened during the events of the series. Choso is the eldest and most powerful of the three, possessing the most refined control over Blood Manipulation. The Death Painting Wombs are frequently cited as one of the most creative and disturbing pieces of lore in the series, and Choso's status as their eldest brother adds considerable weight to every action he takes throughout the story.

Choso's story ends in the final arc of the manga in a moment that deeply affected much of the fandom. After standing beside the protagonist through some of the series' most brutal battles, Choso ultimately sacrifices himself in a final act of brotherly protection. His final moments see him fulfill his role as an elder brother to the very end. His death is widely regarded as one of the most emotionally powerful in the manga, and fan tributes, artwork, and discussions around Choso's ending continue to circulate heavily across social platforms. This Choso stuffed toy is a way for fans to keep his memory alive in a tangible, heartfelt form.