Brass, formally designated Sailor-Multi (SLR-191218 type), is the primary Medabot partner to Arika Amazake (localized as Erika). She operates primarily in a non-combat support role as Arika's camera operator, aiding journalistic activities like gathering scoops and documenting events. Brass possesses a polite and youthfully feminine personality suited to her supportive function.

Though rarely participating in direct Robattles, she demonstrates capable combat proficiency when required. Her combat style emphasizes methodical precision over speed, utilizing an advanced targeting system for accurate shots despite movement limitations. Notable combat actions include gathering repair parts for Metabee while evading Kilobots, rescuing Metabee from Clay Golem, and offering tactical support against a Ninja-type Medabot.

Her background extends into game continuities. In *Medarot R*, Arika acquires Brass after the Roborobo Gang disrupts a television audition. Becoming Arika's partner, Brass enters a Medarot tournament, defeating Iwanoi but losing to Ikki. Within *Medarot 3*, Brass assists an investigation following a magnetic storm disrupting Medarotch systems. She participates in a Robattle against Ikki to verify information about the Roborobo Gang's MiniMini Machine shrinking device and physically restrains a captive Roborobo member during interrogation via tickle torture to extract intelligence.

Across anime seasons and game adaptations, Brass consistently supports Arika's journalistic pursuits through operational assistance and occasional combat intervention, maintaining her established polite demeanor.