Kyudai Garaki/Synopsis

History
At some point, he met All For One and became his personal doctor.

Sometime later, All For One found a discarded boy named Tenko on the streets who had been through a traumatic event. At his master's request, he brought for several sets of hands belonging to the boy's family who were accidentally slaughtered when the boy's quirk manifested. Daruma watched as the boy started experience episodes from recalling the events. Daruma questioned All For One if he should modify Tenko but All For One declines and states that he will teach him how to take his feelings and frustrations and give them purpose.

Unforeseen Simulation Joint Arc
While Tomura was reporting of his mission's failure of killing All Might, Daruma expresses annoyance at his Nomu being defeated before All For One calms him since they've found something intriguing about All Might's students.

Pro Hero Arc
After Endeavor and Hawks's fight with the Artificial Human, High-End, Dabi confronts the two heroes and initiates a fight with them. He is interrupted by Mirko, prompting Dabi to retreat by asking Ujiko for help. Ujiko has Dabi warped away.

Meta Liberation Army Arc
A month prior to the Hero Billboard Chart JP event, the League of Villains were facing Gigantomachia. As they were struggling against the behemoth, Daruma contacts them from the radio implying Tomura's uncertainty in the League's current state and need for help. Tomura was shocked to hear his voice.

Daruma asks Tomura Shigaraki if he's keeping his remaining allies healthy, in which the latter admits that the League is running short on members. However, a tearful Gigantomachia proceeds to smash the ground, causing all League members to lose their footing. As Gigantomachia continues destroying a majority of the landscape, Daruma introduces more info on Gigantomachia to the League, explaining that he once served as All For One's bodyguard. The doctor points out that the colossal beast possesses unlimited stamina and capable of welding multiple Quirks without any complex modifications. The doctor adds on that as All For One's power began to wither away thanks to All Might, the megalomaniac knew that he'll eventually meet his defeat, thus leading to him hiding Gigantomachia from the public eye. Before Gigantomachia prepares to unleash another one of his devastating attacks, Daruma plays a voice recording of All For One from the radio that effectively calms Gigantomachia as he cuddles up to the voice of his "beloved" master. An irritated Tomura claims that he doesn't want to handle Gigantomachia. The doctor tells the young pupil that he spent too much time with Kurogiri and tells him to grow up. Suddenly, black ooze emerges from the League's bodies, transporting them all to a secret laboratory filled with multiple Nomu hybrids.

It is revealed that the doctor was responsible behind the Warping Quirk once used by All For One from the Kamino Incident. He reveals that All For One did this just to make sure his legacy would live on through Tomura's command. The Doctor calls them High-End and says they're much more advanced than the old Nomu. Tomura asks if the Doctor if he can duplicate the Quirk-Destroying Bullets.

Mr. Compress says that he can't see the Doctor and this spooks the latter into hiding in a dark tunnel. The Doctor apologizes and explains that they are not to approach him unless they want to be transported back to Gigantomachia. He introduces himself as Daruma Ujiko, an admitted alias. Daruma tells Tomura that he's only helping out of loyalty to All For One. He claims Tomura himself hasn't accomplished anything and he that must prove that he can carry on All For One's will.

Daruma listens Tomura confesses that he felt empty before meeting All For One and that his hands make him feel both nauseous and at peace yet his heart feels heavy which causes his rage. However, Tomura explains that it's this juxtaposition of feelings that makes him hate everything and want to destroy everything. Tomura tells Daruma that he will show heaven and hell if he will help. Amused, Daruma responds that it's a childish dream but is impressed by how serious Tomura is in his dream. Daruma agrees nonetheless. Mr. Compress notes how easy it was to convince the doctor. Daruma admits that the plan was to always help but he wanted to see Tomura's development. He also admits that he cannot help until they get Gigantomachia to submit. Dabi interrupts saying he will not go back to fight Gigantomachia plus he has a good potential ally waiting. Daruma interjects that Dabi can stay back to help him test out his High-End Nomus. Daruma sends the remaining League of Villains members back to Gigantomachia at Tomura's request using Johnny.