Sweet Mask/Relationships

Genos
Sweet Mask has a generally low opinion of Genos. He converses with Genos after the latter is admitted directly into the S-Class without Sweet Mask's approval, a fact that bothered him, but he accepted nonetheless. 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). However, Genos did not seemed to be bothered by Sweet Mask's comments.

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 with Flashy Flash when King entered the room.

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

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
While at first looking down on Saitama, upon witnessing his power in dealing with Awakened Garou, he seemingly comes to develop an obsession in him, claiming he has the "beauty of overwhelming power".