Sweet Mask/Relationships

Genos
Sweet Mask was notified that Genos is admitted directly into the S-Class, which he accepted nonetheless after seeing that the cyborg seemingly matches up with his view of heroes. He talked to the cyborg hero to give his warm welcome though their conversation was not a pleasant one. He speaks to Genos a second time after the Dark Matter Thieves are defeated, calling Genos a "disappointment" (referencing his defeat by the Deep Sea King and his inability to assist against the alien threat). Genos does not seem to be bothered by his comments and noticed their similarities.

King
Sweet Mask respects King for what he claims as "actually pulling his weight as a S-Class hero." Sweet Mask felt strongly enough about it to stop arguing with Flashy Flash when King entered the room.

Flashy Flash
Sweet Mask easily antagonizes Flashy Flash, almost to the point of clashing. As with most of the other S-Class heroes, Sweet Mask believes himself superior to Flashy Flash.

Flashy Flash does not like Sweet Mask's authoritative and egotistical attitude. While he has some disdain towards some of the S-Class heroes, the tone he gives off is either of annoyance or even teasing, as seen with his interactions with Metal Bat. Flash's displeasure towards Sweet Mask goes to the point of eliciting his murderous intent towards the fellow hero. He goes out of his way to instigate a challenge against Sweet Mask.

Zombieman
Sweet Mask mockingly (but accurately) calls Zombieman a monster, calling into question his inhuman regeneration abilities and mysterious past. Zombieman is annoyed by Mask, but maintains his cool.

Feather
While he looks down on most heroes, he respects Feather, saying he has star potential.

Saitama
When first hearing mention of him after Saitama killed the Sea King, Mr. Mask's opinion relegates the newbie as having the aura of a B-Class hero, based on appearances via the video feed alone. After watching the footage of Saitama defeating Sea King, Sweet Mask begin to have a minor interest in the caped bald hero's tremendous strength, thus allowing to rank Saitama up to B-class.

After witnessing Saitama defeat Garou, however, not only does Sweet Mask fully acknowledge Saitama's tremendous strength, but becomes somewhat obsessed with him, considering him to possess the true beauty of overwhelming power, which meets his standards of being a hero. He would start comparing new heroes with Saitama, even starting a new hero project that would feature the bald hero. Despite his admiration for Saitama, he still showed great displeasure for his refusal to kill Garou and lectured the hero for it.

After Sweet Mask told Saitama his origins, Saitama told him that appearances and origins don't matter, nor does the public opinion, and that how you view yourself is more important. When a monster known as Pesky Clown attacks the citizens and fights Sweet Mask singlehandedly, the monster becomes too powerful for Sweet Mask to fight in his human form and he was forced to transform into his monster state. After defeating the monster, he saw his fans disgust him for his appearance. Saitama arrives and he demanded the hero to kill him to be famous, still clinging to his ideals of being a hero. However, Saitama thinks he is cool and even helps him escape the scene despite the act of trying to kill him. Saitama told him to become his own ideal hero.