Isamu/Relationships

Bofoi
Bofoi and Child Emperor are two of the only heroes whose intelligence and reliance on their own technology are their strength while not possessing any superhuman attributes or abilities (disregarding Child Emperor's above average human abilities).

Child Emperor appears to be one of the few heroes that Bofoi frequently keeps in contact with, as he has displayed multiple moments of temper tantrums that Child Emperor is used to dealing with. Beyond that however, their relationship appears to be a professional one rather than an intimate one.

Child Emperor and Bofoi have contrasting mindsets due to their differing personalities. Child Emperor has a caring side that makes him think of the well being of others in a given situation, while Bofoi focuses on a more cold and calculating method in order to achieve better results without excessive consequences. This creates a conflict between the two when proposing strategies in a given situation.

Child Emperor seems to hold some level of respect for Bofoi. Upon hearing of him not partaking in the rescue and ambush of the Monster Association, Child Emperor was shocked and attempted to make Bofoi reconsider, though he would find some of Bofoi's methods to be more excessive than it has to be. Bofoi seems to hold Child Emperor to some level of regard, as he expected Child Emperor to analyze the situation better than he did and lectured him about his failings and potential of the Monster Association threat.

He was formerly Bofoi's assistant. After the events of the Monster Association Arc Child Emperor lost his trust in Bofoi and planned to cut all connections he had with him.

Tatsumaki
Despite his confidence in her power, Child Emperor greatly dislikes Tatsumaki's arrogant and selfish attitude and lack of strategical thinking since she thinks she can take on the entire Monster Association and the Human Monster Garou by herself to the point of berating the needs for a whole group S-class heroes as a support in the operation. While being polite from the outside, he is not above thinking of her as a brat rather than an adult. However, he seems to be very respectful to her as he offered her some orange juice in one of Yusuke Murata's art. Tatsumaki doesn't seem to like it, but she's not opposing it either.

King
Child Emperor seems to idolize King as he is the 'Strongest man on Earth'. He seems disappointed and down, thinking that King still sees and treats him as a child when he realized King decided to take unauthorized action and ditch his plan to infiltrate the Mysterious Beings/Monster Association and went to his designated location immediately.

Zombieman
Child Emperor respects Zombieman due to his level-headed attitude and perseverance in combat. To Child Emperor, Zombieman is one of the only reasonable S-Class heroes. Their relationship grows during the Monster Association raid: when fighting Phoenix Man, Zombieman radios Child Emperor, telling him of the robots he encountered and defeated thanks to the weaknesses Child Emperor hypothesized. Zombieman continues by thanking Child Emperor on behalf of everyone and telling the child he was glad he (Child Emperor) was there. These words deeply moved Child Emperor and brought him to tears, and he replies by saying he hopes everything goes fine with Zombieman. Thanks to his words of appreciation, Child Emperor's resolve is reaffirmed, and he proclaims to Phoenix Man that he'll follow the example of a hero he wants to be, with a silhouette of Zombieman appearing, demonstrating the way Child Emperor has begun to look up to Zombieman.

Saitama
The two initially had little interactions, and only talk with each other during the Monster Association raid. When Phoenix Man talks to Child Emperor in his Phoenix Space, Saitama intervenes and attempts to protect Child Emperor. Once Phoenix Man is defeated, Saitama approaches Child Emperor and compliments the child, telling him that he's a great hero. Child Emperor is thankful for these words, but upon realizing who Saitama is, grows deeply suspicious of him. This suspicion is lessened when Saitama effortlessly defeats Gale Wind and Hellfire Flame, impressing Child Emperor when he finds out that they're both S-Class criminals, though Child Emperor still remains wary of him and decides not to tell him anything about the mission.