All 43 costumes of Himesaki Rinami in-game, with their unlock conditions — taken from the publisher's own released data (Costume.yaml).
GO MY WAY!!
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
SUGAR FLAVOR
Obtained by pulling Himesaki Rinami in the "SUGAR FLAVOR" gacha banner
SUGAR FLAVOR
Obtained when Himesaki Rinami ("SUGAR FLAVOR" version) reaches Talent Bloom stage 4
Junk Road (ガラクタロード)
Obtained by pulling Himesaki Rinami in the "Junk Road (ガラクタロード)" gacha banner
Junk Road (ガラクタロード)
Obtained when Himesaki Rinami ("Junk Road (ガラクタロード)" version) reaches Talent Bloom stage 4
ENDLESS DANCE
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
Let's Charge Forward! (がむしゃらに行こう！)
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
36°C U·B·U (36℃ U･B･U)
Obtained by pulling Himesaki Rinami in the "36°C U·B·U (36℃ U･B･U)" gacha banner
36°C U·B·U (36℃ U･B･U)
Obtained when Himesaki Rinami ("36°C U·B·U (36℃ U･B･U)" version) reaches Talent Bloom stage 4
Miracle Nanau! (ミラクルナナウ(ﾟ∀ﾟ)！)
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
Howling over the World
Obtained by pulling Himesaki Rinami in the "Howling over the World" gacha banner
A Piece of Cake, Anytime Anywhere (古今東西ちょちょいのちょい)
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
Cherry Blossom Photograph (桜フォトグラフ)
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
As the Snow Melts (雪解けに)
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
Happy Millefeuille (ハッピーミルフィーユ)
Obtained by pulling Himesaki Rinami in the "Happy Millefeuille (ハッピーミルフィーユ)" gacha banner
Happy Millefeuille (ハッピーミルフィーユ)
Obtained when Himesaki Rinami ("Happy Millefeuille (ハッピーミルフィーユ)" version) reaches Talent Bloom stage 4
Campus mode!!
Obtained by pulling Himesaki Rinami in the "Campus mode!!" gacha banner
Campus mode!!
Obtained when Himesaki Rinami ("Campus mode!!" version) reaches Talent Bloom stage 4
White Night! White Wish!
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
L.U.V
Obtained by pulling Himesaki Rinami in the "L.U.V" gacha banner
L.U.V
Obtained when Himesaki Rinami ("L.U.V" version) reaches Talent Bloom stage 4
Costume Rhapsody (仮装狂騒曲)
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
Crowning Chrysanthemum (冠菊)
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
You and Semi-Blue (キミとセミブルー)
Obtained by pulling Himesaki Rinami in the "You and Semi-Blue (キミとセミブルー)" gacha banner
You and Semi-Blue (キミとセミブルー)
Obtained when Himesaki Rinami ("You and Semi-Blue (キミとセミブルー)" version) reaches Talent Bloom stage 4
clumsy trick
Obtained by pulling Himesaki Rinami in the "clumsy trick" gacha banner
clumsy trick
Obtained when Himesaki Rinami ("clumsy trick" 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 Himesaki Rinami's Path to Idol
Gleam of Platinum (プラチナの輝き)
Clear Stage 15 of Himesaki Rinami's Path to Idol
Gleam of Jet Black (漆黒の輝き)
Clear Stage 25 of Himesaki Rinami's Path to Idol
Favorite Casual Wear (お気に入りの私服)
Obtained as an event reward
Hatsuboshi Academy Uniform (初星学園制服)
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 Himesaki Rinami's Master Achievement to Rank 3
Heart Apron (ハートエプロン)
Purchasable directly in the costume shop
Sailor Swimsuit (セーラーミズギ)
Purchasable directly in the costume shop
Hoodie Swimsuit (パーカー水着)
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
Welcome to Hatsuboshi Hot Spring (ようこそ初星温泉)
Obtained by pulling Himesaki Rinami in the "Welcome to Hatsuboshi Hot Spring (ようこそ初星温泉)" gacha banner
Welcome to Hatsuboshi Hot Spring (ようこそ初星温泉)
Obtained when Himesaki Rinami ("Welcome to Hatsuboshi Hot Spring (ようこそ初星温泉)" version) reaches Talent Bloom stage 4
Child Smock (チャイルドスモック)
Purchasable via a costume bundle pack (or other means)
Hot Spring Bath Towel (温泉バスタオル)
Currently unobtainable
