Mami Futami forms one half of identical twin idols at 765 Production, collaborating with her sister Ami while concealing their twin identity from fans by taking turns performing under Ami’s name. Her left-sided hair tie and eventual decision to grow slightly longer hair distinguish her from Ami’s right-sided accessory in later portrayals. Though both radiate hyperactive energy, delighting in pranks and mimicry, Mami exhibits greater compliance when corrected by figures like producer Ritsuko Akizuki, hinting at her underlying maturity.

Beyond their idol routines, the twins nurture miniature Puchidol companions resembling tiny agency idols—including Afuu and Yukipo—and impulsively adopt Takanya after rescuing her from repatriation to Brazil. Their caretaking often spirals into whimsical chaos, underscoring their knack for blending mischief with spontaneity.

As Ami’s popularity surges through her Ryuuguu Komachi subunit activities, Mami deliberately cultivates a separate identity, lengthening her hair and refining a more self-assured solo persona. This evolution mirrors her resolve to step beyond their mirrored image without severing their inseparable bond. Familial tensions with an overprotective mother occasionally prompt the twins to retreat to the agency’s office, further intertwining their personal and professional lives.

In *THE iDOLM@STER 2*, Mami’s independent producibility and temporary Ryuuguu Komachi role under Ritsuko’s guidance highlight her growing versatility. Throughout their journey, the sisters’ dynamic persists as a cornerstone, intertwining their trademark antics with collaborative loyalty toward peers and Puchidols alike.