Inui Sisters Arc

Marin and Wakana meet veteran cosplayer Sajuna 'Juju' Inui and her photographer sister Shinju, expanding their friend group and learning advanced techniques.

The Inui Sisters arc broadens the cast of My Dress-Up Darling and introduces two characters who become close friends and creative collaborators. While at an event, Marin encounters Sajuna Inui, a respected and experienced cosplayer who works under the handle Juju. Despite her small, youthful appearance, Sajuna is actually older than Marin and Wakana, and she is admired in the community for her polished, atmospheric photographs. Alongside her is her younger sister Shinju, a tall and gentle girl who serves as Sajuna's devoted photographer and supports her sister's passion wholeheartedly. The arc explores the contrast between Sajuna's perfectionism and Marin's exuberant spontaneity. Sajuna initially measures herself against other cosplayers, and her interactions with Marin lead her to reflect on why she cosplays and what fulfillment she seeks from the hobby. Wakana, meanwhile, is drawn into more technical challenges, including costumes that require special construction and props, which push his craftsmanship to new levels. Shinju's quiet dedication to photography also highlights the often-overlooked role of the photographer in capturing a cosplay properly. As the four spend more time together, genuine friendships form. The Inui sisters add emotional depth and gentle comedy to the story, and their presence helps Marin and Wakana grow both as creators and as people. The arc emphasizes themes of self-acceptance, supporting the people you care about, and finding community in a shared passion. By its conclusion, the cast has expanded into a warm group of friends who regularly collaborate on increasingly ambitious cosplay projects.