Favorite Foods: Hamburger steak (especially tofu burger) with demiglace sauce
Favorite Artist: Sumika and GReeeeN
Favorite Animal: Dog
Favorite School Subject: Science
Hobbies: Watching anime and reading novels, particularly ones that have been made into movies
Charm point: Long eyelashes
Special skills: Volleyball (blocker), abacus, mental math
Catchphrase: I'll run up Osaka, Kosaka, Hinatazaka, all three-zaka with all my might!" (大阪、小坂、日向坂、三本坂を全力で駆け上ります! Osaka, Kosaka, Hinatazaka, mihonzaka wo zenryoku de kake noborimasu!)
Had no dance experience prior to joining the group
Inspired to audition for Hiragana Keyakizaka46 after watching the Zepp Namba (Osaka) performance of Hiragana National Tour 2017 in May 2017
First member across all 48 and 46 groups to become a group's overall Center, despite not being part of its 1st Generation
Her nickname (Kosakana) is her name without the last 'o', means 'little fish'
On 26 Jun 2021, she suspended activities with the group due to bad health. Would later resume activities on 04 Mar 2022
Loves reptiles and dinosaurs. The Instagram account created to promote her first photobook was called "Kosakanatops", a portmanteau of "Kosakana" and "Triceratops"
In the music video for Tteka, Higashimura Mei picks up a triceratops plushie near the end of the video. The members explained that this plushie was meant to represent Nao, who did not participate in the single due to her hiatus
Has a calm personality
Before the hosts of Hiragana Oshi were announced, members were asked who they'd like to have. Nao was the only member to choose Audrey, the comedy duo eventually selected. Her reasoning was "they're good at conversation, so thought it'd be fun if we had them as MCs."
Nominated as co-host Wakabayashi Masayasu's favorite member for this reason
Ranked 1st in the Lucky Girl Ranking 2019 on Hiragana Oshi
Close friends with Kamimura Hinano. On a segment on HINABINGO!, she chose Hinano as her ideal little sister and Hinano chose her as her ideal big sister
Close friends with Kanemura Miku, as they are of the same generation and only three days apart in age. Their duo name is called NaoMiku