Onimai fans, your pastel bunny dreams are about to hop into the prize corner. 🐰
Onimai: I’m Now Your Sister!（お兄ちゃんはおしまい！）brings Mahiro Oyama to arcades in a brand-new “Pastel Bunny Ver.” figure from System Service’s prize brand One-Seventh Carat. Standing around 17 cm tall and designed to sit on your shelf without a base, this soft-colored bunny Mahiro will start appearing as an amusement prize across Japan from the fourth week of November 2025.
Pastel Bunny Mahiro Hops into One-Seventh Carat
Mahiro Oyama from Onimai: I’m Now Your Sister! is getting a new prize figure as part of System Service’s brand One-Seventh Carat. This time, Mahiro shows up in a “Pastel Bunny Ver.” outfit—think soft, gentle colors, bunny ears and a playful pose that fits the character’s chaotic-but-cute energy.
The figure is an arcade prize only, not a standard scale figure sold at hobby shops, which makes it especially appealing for collectors who enjoy hunting down crane game exclusives. It’s the kind of design that looks right at home on a pastel-themed, moé-heavy shelf full of Onimai merch.
Cute Details and 17 cm Presence for Your Onimai Shelf
The figure is approximately 17 cm tall, giving it enough presence to stand out without overwhelming the rest of your collection. The “Pastel Bunny” concept emphasizes a soft color palette and a friendly, cheerful expression rather than a flashy casino bunny style. It feels more like Mahiro being dressed up for a cute event than a serious, glamorous costume.
At this size, Mahiro pairs nicely with other prize figures, trading figures or small-scale Onimai goods. It’s easy to imagine her sitting next to acrylic stands, mini plushies or your favorite Blu-ray cases, adding a little extra chaos and cuteness to your display.
A Prize Figure Brand Built to Stand Without a Base
One of the key selling points of One-Seventh Carat is right in its concept: these figures are designed to be displayed without a base. Rather than relying on a big plastic stand, the sculpt and balance are tuned so the figure can sit directly on your shelf or desk.
For collectors with limited space, that’s a big plus. No large logo plate, no oversized disc under the character—just Mahiro herself taking up as little extra room as possible while still having solid volume as a prize figure. System Service describes the brand as focusing on “volume you can enjoy while displaying it as-is,” and this Mahiro Pastel Bunny Ver. fits that idea nicely.
Arcade Debut Timing for This Pastel Bunny Figure
The Onimai: I’m Now Your Sister! One-Seventh Carat Figure – Mahiro Oyama Pastel Bunny Ver. is scheduled to appear as an amusement prize from the fourth week of November 2025 in Japan.
Rollout: starting late November 2025, week 4
Where: amusement facilities (arcades, crane game corners) across Japan
Store locator: One-Seventh Carat Mahiro arcade store list
As with most prize items, it’s only available while supplies last. Once stock runs out at a location, that’s it—so Japanese fans will want to keep an eye on local arcades around the release window.
Follow and Repost to Win the Pastel Bunny Version
To celebrate the figure’s debut, System Service is running an X (Twitter) campaign where fans can try to win Mahiro’s Pastel Bunny Ver. directly.
Prize: “Onimai: I’m Now Your Sister! One-Seventh Carat Figure – Mahiro Oyama Pastel Bunny Ver.” (November prize)
Winners: 5 people by lottery
Campaign period: November 14 – November 19, 11:59 p.m. (JST)
To enter, simply follow the official account @ss_maniac (System Service Maniac Sales Dept.) and repost the designated campaign post. It’s a straightforward giveaway, and for fans who can’t reliably win at crane games, it’s a nice second chance to bring Mahiro home.
For more Onimai updates, you can also follow the anime’s official accounts:
Anime X: @onimai_anime
Anime site: Onimai anime official website
Company site: System Service official site
Tips for Overseas Fans Who Want This Arcade Exclusive
Because Mahiro’s Pastel Bunny Ver. is an arcade prize, it won’t be sold directly at standard international retailers. However, overseas fans still have a few options if they want to add this bunny to their collection.
You can keep an eye on online shops that specialize in Japanese prize figures, check second-hand stores and marketplaces that ship worldwide, or use proxy services that buy items in Japan and forward them overseas. Availability will depend heavily on demand and stock, so if you’re an Onimai collector, it’s best to start watching the market soon after the late November rollout.
With its pastel colors, bunny ears, and no-base design, this Mahiro figure feels like the kind of piece that will quietly become a “if you know, you know” gem in Onimai collections.
In short: if you love Mahiro and pastel bunny aesthetics, keep an eye on Japanese arcades in late November or watch online prize figure shops afterwards. One-Seventh Carat’s Mahiro Pastel Bunny Ver. is designed to be easy to display, hard to forget, and just rare enough to feel special.
©ねことうふ・一迅社／「おにまい」製作委員会
