All 39 costumes of Fujita Kotone in-game, with their unlock conditions — taken from the publisher's own released data (Costume.yaml).
GO MY WAY!!
Obtained by pulling Fujita Kotone in the "GO MY WAY!!" gacha banner
GO MY WAY!!
Obtained when Fujita Kotone ("GO MY WAY!!" version) reaches Talent Bloom stage 4
ENDLESS DANCE
Obtained by pulling Fujita Kotone in the "The Cutest Me in the World (世界一可愛い私)" gacha banner
Let's Charge Forward! (がむしゃらに行こう！)
Obtained by pulling Fujita Kotone in the "Let's Charge Forward! (がむしゃらに行こう！)" gacha banner
Let's Charge Forward! (がむしゃらに行こう！)
Obtained when Fujita Kotone ("Let's Charge Forward! (がむしゃらに行こう！)" version) reaches Talent Bloom stage 4
Miracle Nanau! (ミラクルナナウ(ﾟ∀ﾟ)！)
Obtained by pulling Fujita Kotone in the "The Cutest Me in the World (世界一可愛い私)" gacha banner
The Self-Esteem-Boosting Lovey-Dovey Song (自己肯定感爆上げ↑↑しゅきしゅきソング)
Obtained by pulling Fujita Kotone in the "The Self-Esteem-Boosting Lovey-Dovey Song (自己肯定感爆上げ↑↑しゅきしゅきソング)" gacha banner
The Self-Esteem-Boosting Lovey-Dovey Song (自己肯定感爆上げ↑↑しゅきしゅきソング)
Obtained when Fujita Kotone ("The Self-Esteem-Boosting Lovey-Dovey Song (自己肯定感爆上げ↑↑しゅきしゅきソング)" version) reaches Talent Bloom stage 4
Howling over the World
Obtained by pulling Fujita Kotone in the "The Cutest Me in the World (世界一可愛い私)" gacha banner
A Piece of Cake, Anytime Anywhere (古今東西ちょちょいのちょい)
Obtained by pulling Fujita Kotone in the "The Cutest Me in the World (世界一可愛い私)" gacha banner
Iris After the Rain (雨上がりのアイリス)
Obtained by pulling Fujita Kotone in the "Iris After the Rain (雨上がりのアイリス)" gacha banner
Iris After the Rain (雨上がりのアイリス)
Obtained when Fujita Kotone ("Iris After the Rain (雨上がりのアイリス)" version) reaches Talent Bloom stage 4
Cherry Blossom Photograph (桜フォトグラフ)
Obtained by pulling Fujita Kotone in the "The Cutest Me in the World (世界一可愛い私)" gacha banner
As the Snow Melts (雪解けに)
Obtained by pulling Fujita Kotone in the "The Cutest Me in the World (世界一可愛い私)" gacha banner
Happy Millefeuille (ハッピーミルフィーユ)
Obtained by pulling Fujita Kotone in the "The Cutest Me in the World (世界一可愛い私)" gacha banner
Campus mode!!
Obtained by pulling Fujita Kotone in the "Campus mode!!" gacha banner
Campus mode!!
Obtained when Fujita Kotone ("Campus mode!!" version) reaches Talent Bloom stage 4
White Night! White Wish!
Obtained by pulling Fujita Kotone in the "White Night! White Wish!" gacha banner
Costume Rhapsody (仮装狂騒曲)
Obtained by pulling Fujita Kotone in the "The Cutest Me in the World (世界一可愛い私)" gacha banner
Crowning Chrysanthemum (冠菊)
Obtained by pulling Fujita Kotone in the "Crowning Chrysanthemum (冠菊)" gacha banner
Crowning Chrysanthemum (冠菊)
Obtained when Fujita Kotone ("Crowning Chrysanthemum (冠菊)" version) reaches Talent Bloom stage 4
You and Semi-Blue (キミとセミブルー)
Obtained by pulling Fujita Kotone in the "The Cutest Me in the World (世界一可愛い私)" gacha banner
Yellow Big Bang! (Yellow Big Bang！)
Obtained by pulling Fujita Kotone in the "Yellow Big Bang! (Yellow Big Bang！)" gacha banner
Yellow Big Bang! (Yellow Big Bang！)
Obtained when Fujita Kotone ("Yellow Big Bang! (Yellow Big Bang！)" version) reaches Talent Bloom stage 4
The Cutest Me in the World (世界一可愛い私)
Obtained by pulling Fujita Kotone in the "The Cutest Me in the World (世界一可愛い私)" gacha banner
The Cutest Me in the World (世界一可愛い私)
Obtained when Fujita Kotone ("The Cutest Me in the World (世界一可愛い私)" version) reaches Talent Bloom stage 4
Beginning (初（はじめ）)
Owned from the start
Gleam of Gold (ゴールドの輝き)
Clear Stage 10 of Fujita Kotone's Path to Idol
Gleam of Platinum (プラチナの輝き)
Clear Stage 15 of Fujita Kotone's Path to Idol
Gleam of Jet Black (漆黒の輝き)
Clear Stage 25 of Fujita Kotone's Path to Idol
Favorite Casual Wear (お気に入りの私服)
Obtained as an event reward
Everyday Casual Wear (いつもの私服)
Owned from the start
Lesson Wear (レッスンウェア)Training Outfit
Owned from the start
Lesson Wear (レッスンウェア)Training Outfit
Raise Fujita Kotone's Master Achievement to Rank 3
Festival Happi Coat (祭法被)
Purchasable directly in the costume shop
Sailor Swimsuit (セーラーミズギ)
Purchasable directly in the costume shop
Hatsuboshi Academy Gym Uniform (初星学園体操服)Training Outfit
Purchasable directly in the costume shop
Hot Spring Swimsuit (温泉用水着)
Purchasable directly in the costume shop
Child Smock (チャイルドスモック)
Purchasable via a costume bundle pack (or other means)
