Aiko Takamori is a 16-year-old female idol from Tokyo, born July 25 under the Leo sign. She stands 155 cm tall, weighs 42 kg, and has blood type O, with physical measurements of 74-60-79 cm. She possesses brown hair and brown eyes, frequently styled with various flower hairpieces in a bun or high ponytail. Her theme color is grass green.

Her personality is gentle, positive, and calm, generating a soothing aura that makes people lose track of time during conversations. She dislikes competition due to her "soft sister" nature and protests against cutthroat auditions and live battles, yet adopts a more positive view of competitiveness to deliver pleasant feelings to her fans. She rarely gets angry or upset, becoming a comforting figure for fellow idols who confide in her. Her composure falters when wearing uncomfortable outfits or during heart-to-heart talks. Her style draws frequent comparisons to Mori Kei fashion, though she questions the label "Mori Girl."

Her hobbies include photography and walking in parks; among her fans, it is common courtesy not to disturb her during these park walks.

She participates in multiple idol units reflecting her relationships. She forms Positive Passion with close friends Akane Hino and Mio Honda. She is part of Zekkenzu alongside Akane Hino, Airi Totoki, Yuko Hori, and Syoko Hoshi. Her other units include Indigo Bell with Karin Domyoji, Einferia with Yumi Aiba, Minami Nitta, Fumika Sagisawa, and Arisu Tachibana, Flowery with Yumi Aiba, Trichromatic Nature with Karen Hojo and Kyoko Igarashi, Festa Felice with Yukari Mizumoto, Kotoka Saionji, Hotaru Shiragiku, and Kyoko Igarashi, and ephemera with Mayu Sakuma, Chieri Ogata, Yoshino Yorita, and Hijiri Mochizuki. She is also friends with Tsubaki Egami.

Her surname Takamori combines "tall, high" (高) and "forest" (森), while her given name Aiko means "indigo" (藍) and "child" (子).