Yamaguchi Haruyo is a member of Hinatazaka46's 3rd Generation.
- Hinatazaka de Aimashou (日向坂で会いましょう) (2019 - )
- Hinatazaka46 desu. Chotto Ii Desu Ka? (日向坂46です。ちょっといいですか？) (2020 - )
- Her audition SHOWROOM number was #77. Her nickname during the auditions was Nana-chan (ななちゃん).
- Her favorite Sakamichi Series members are Yoda Yuki, Hirate Yurina and Kakizaki Memi.
- Hobbies: Baseball, reading manga, hearing scary stories, playing games
- Favorite foods: Yukhoe , omelet, broccoli, apples, green onions, dry curry
- Hated foods: Tomato, eggplant, rice with egg
- Favorite season: Winter
- Favorite songs:
- Hinatazaka46's songs: Suki to Iu Koto wa..., Mama no Dress, Honto no Jikan, Kimi ni Hanashite Okitai Koto, Kitai Shitenai Jibun, Wazuka na Hikari
- Keyakizaka46's songs: I'm out, 100nen Matteba, Seifuku to Taiyou, Taiyou wa Miageru Hito wo Erabanai, AM1:27
- Nogizaka46's songs: I see..., Kassouro, Arigachi na Renai, Atarashii Sekai, Kyuushamen, No You na Sonzai, Shiroi Kumo ni Notte
- 48 Group's songs: 10nen Zakura, "Seito Techo no Shashin wa Ki ni Haittenai" no Hoshoku, Zetsumetsu Kurokami Shoujo
- Yamamoto Sayaka's songs: Hitoiki Tsukinagara
- Fujiwara Sakura's songs: Kawaii (かわいい), BABY, Someday, Mata Ashita (また明日)
- Kamishiraishi Mone's songs: Eien wa Kirai (永遠はきらい)
- adieu's songs: Narratage (ナタラージュ), Yoru no Ato (よるのあと)
- Hoshino Gen's songs: Yume no Soto e (夢の外へ)
- Sekai no Owari's songs: yume, Hakuchuu no Yume (白昼の夢)
- Macaroni Enpitsu's songs: Koibito Gokko (恋人ごっこ)
- Sumika's songs: Dengonuta (伝言歌), Fukkatsu no Jumon (ふっかつのじゅもん)
- Back Number's songs: Shiawase (幸せ), Nichiyoubi (日曜日)
- Her dream when she was little was to be a dental hygienist.