Mustard/Relationships

Muscular
Mustard and Muscular seem to get along well enough despite their opposing views on strategic planning, Mustard believing that it's best to wait for the right time, and Muscular believing that it's best to just attack now and worry about the details later.

Himiko Toga
Mustard considers Himiko to be impractical, as he criticized her for caring more about whether or not her support gear was cute than for the equipments functionality.

Stain
Mustard has great respect for the hero killer and was inspired by his last words before his capture.