Ami Futami is one of the twin idols represented under 765 Production, performing alongside her identical twin sister Mami. The two conceal their dual existence by appearing publicly under the single identity of Ami Futami, a secret known only to agency staff and fellow idol Takane Shijou. Physically indistinguishable except for their hair partings, Ami parts and ties her hair to the right while Mami parts hers to the left. Ami is established as the younger twin in later media. Both share the same profile: age 13, height 158 cm, weight 42 kg, blood type B, and a birthday of May 22.

Ami has a playful, energetic, and mischievous personality, frequently collaborating with Mami on pranks, imitations, and chaotic antics that disrupt productions. This often leads to discipline from studio manager Ritsuko Akizuki, whom the twins fear; punishments typically involve office chores. Like Mami and fellow idol Miki Hoshii, Ami refers to herself in the third person as Ami. The twins are notably informal, addressing seniors as peers unless corrected, and share a strong bond with the producer, often seeking his company during leisure activities. Ami also enjoys doodling on surfaces. She habitually mishears and mispronounces lyrics during performances, such as singing Tokachi tsukuchite instead of Tokashi tsukushite in Agent Yoru o Yuku, which earned a fan nickname. Their family includes only their parents; their mother is highly protective, sometimes excessively so, prompting the twins to take refuge at the 765 Production office.

In certain game iterations, Ami joins the unit Ryuuguu Komachi under Ritsuko Akizuki’s management. Across anime and movie appearances, including the film Beyond the Brilliant Future, she participates in group activities such as concert preparation and training camps. In spin‑off titles, she retains her core characteristics while taking part in new performances and theater activities. Her vocal contributions include shared image songs with Mami as well as solo tracks.