Choso is a character in the manga series Jujutsu Kaisen. He is one of the Special Grade Cursed Objects, the Death Paintings, that allows him to manipulate blood. He was created by the jujutsu sorcerer Noritoshi Kamo, an ancient sorcerer who was obsessed with creating a new type of cursed object, and used his blood to mix with the blood of a pregnant woman. He is the eldest of the Death Paintings and has a strong sense of loyalty to his family. He is also very protective of his brothers, Kechizu and Eso.
Choso’s love for his brothers

Despite being created with evil intentions and inhuman actions, he grew to love his brothers, Kechizu and Eso. They were the only family he had ever known, and he would do anything to protect them. Upon being incarnated, Choso told his two brothers that the three of them lived only for one another and that they were all one.

When Yuji killed Kechizu and Eso, he was devastated. He agreed to fight alongside Mahito and Geto but ultimately only pursued the goal of avenging his brothers during the Shibuya Incident.
Choso avenges his brothers in the Shibuya arc
In the Shibuya Incident, Choso joined forces with Mahito and the other curses to attack Shibuya. He fought against Yuji Itadori and earned the opportunity to take revenge on Yuji but could feel his impending death right before dealing the killing blow. It’s a side effect of his composition as a Death Painting Womb and of his cursed technique. he can feel the death of his brothers and feels the same intense sensation from Yuji’s impending death as he did from Eso and Kechizu’s.
Jujutsu Kaisen, Ch. 204: Choso gets a helpful push in battle! Read it FREE from the official source! https://t.co/YRH9e5eOMa pic.twitter.com/g26o5EdMmE
— Shonen Jump (@shonenjump) November 13, 2022
A twist in the story
Once Choso realized that Noritoshi Kamo survived by moving from body to body, he surmised that Yuji must be his relative through that connection. He was quick to deem him one of his younger brothers and align himself with him. He devoted all his strength to protecting Yuji for the remainder of their time in Shibuya and focused his vengeance on Kenjaku for manipulating him into hurting his little brother.

Although Choso has been accepted by Yuji, he still regrets what happened with Eso and Kechizu. He feels responsible for the death of his younger brothers and fears that Yuji will be left alone because of his older brother’s foolish choices. Choso initially decided to live as curses because he knew Eso and Kechizu wouldn’t be accepted by humanity.
Choso now felt as if that was the easy path which in turn ruined a future where the four of them were destined to all fight together. He was very emotional when admitting this to Yuki, who eventually told him to die as a curse so he could live on as a human alongside Yuji.

In conclusion, Choso’s story is a tragic one. He was created as a weapon, but he was also capable of love and compassion. He avenged the deaths of his brothers, but he also died in the process. His story is a reminder that even the most tragic of circumstances can produce someone capable of great love and sacrifice. Read the manga here to get to know his full story.