#COMPASS Battle Providence Analysis System is introducing four new costumes for Halloween 2026. Announced through #COMPASS News on September 27, the seasonal outfits belong to Amairo Kitsunegasaki, Ura Onigashiki, Cu Sith, and Merunya Lancelna, with their in-game appearance scheduled for after maintenance on September 28, 2026.
The main announcement was followed by individual character visuals. While all four share the broader Halloween palette, each costume preserves the identity of its original hero—from Ura's onmyoji background and Amairo's spirit-slayer aesthetic to Cu Sith's mechanical design language and Merunya's magic-and-spirit-user theme.
Quick Summary
- Game: #COMPASS Battle Providence Analysis System
- Japanese title: #コンパス 戦闘摂理解析システム
- Announcement: Halloween 2026 new costumes
- Main announcement date: September 27, 2026
- Implementation schedule: after maintenance on September 28, 2026
- Number of new costumes: 4
- First hero: 狐ヶ咲甘色 / Amairo
- Second hero: 鬼ヶ式うら / Ura
- Third hero: クー・シー / Cu Sith
- Fourth hero: メルーニャ・ランチェルナ / Merunya Lancelna
- Amairo costume: 討魔装衣「滅紫家菊」
- Ura costume: 陰陽衣裳「紫黒大蛇」
- Cu Sith costume-specific name: not shown in the verified individual post
- Merunya costume-specific name: not shown in the verified individual post
- Amairo CV: Kana Hanazawa
- Ura CV: Mutsumi Tamura
- Cu Sith CV: Shiori Izawa
- Merunya CV: Yui Horie
- Amairo role: Attacker
- Ura role: Tank
- Cu Sith role: Attacker
- Merunya role: Gunner
- Amairo designer: fuzichoco / 藤ちょこ
- Ura designer: haru
- Cu Sith designer: Nidy-2D-
- Merunya designer: EB十
- Official video: available
- Video format: prerecorded / non-live
- Video platform: YouTube
- Costume pricing: not detailed in the main announcement
- Acquisition method: not detailed in the main announcement
- Availability end date: not detailed in the main announcement
- Game platforms: iOS and Android
- Genre: real-time online battle game
- Battle format: 3v3
- Business model: basic free with paid items
- Operator / developer: NHN PlayArt and DWANGO
Halloween 2026 Announcement and Video
Ura Wears Inyou Ishou "Shikoku Orochi"
The Halloween costume for Ura Onigashiki is introduced under the label 陰陽衣裳「紫黒大蛇」. The design retains her connection to the onmyoji world while transforming that identity into a darker and more formal Halloween look.
Her outfit is dominated by black with purple and orange detailing, accompanied by a tall Halloween-styled hat and a folding-fan accessory that preserves a distinctive silhouette. Rather than dressing her as a conventional monster, the costume feels like a supernatural onmyoji attending a night procession.
The official visual also includes Ura's line, “仕事の時間だ。無駄口は慎むように。” It fits the serious demeanor of a character officially described as an employee of “株式会社陰陽師.”
Ura is voiced by Mutsumi Tamura, designed by haru, and associated with hero music by teniwoha. In battle she is a Tank specialized in launching opponents into the air through several different tools.
Amairo Receives Touma Soui "Messhikegiku"
Amairo Kitsunegasaki receives 討魔装衣「滅紫家菊」, continuing her identity as a “討魔士” who destroys evil spirits with a single sword.
The new Halloween design combines black and purple clothing with orange accents, a witch hat, and a kitsune mask closely tied to Amairo's established identity. A large lollipop adds a candy motif without replacing the blade that remains central to her character.
Her official character card carries the line 「『狐ヶ咲』の太刀、受けてみよ」, emphasizing that the seasonal costume still presents her as a swordswoman despite its more playful Halloween styling.
Amairo is voiced by Kana Hanazawa, designed by fuzichoco, and associated with music by Hifumi. She is an Attacker whose Hero Action functions as an iai counter, nullifying attacks within range before immediately retaliating.
Cu Sith Combines Patchwork, Scissors, and Halloween Colors
Unlike Ura and Amairo, whose individual posts display specific outfit names, the verified Cu Sith introduction only identifies the design as her new Halloween costume without showing an additional formal costume title.
Her design combines yellow, purple, and black in a patchwork Halloween dress. Stitching and scissor motifs feature prominently, while Cu Sith's mechanical weapon language remains intact so the outfit does not lose the science-fiction identity of the character.
The official post plays into the trick-or-treat theme by having her ask the Commander for candy. Yet Cu Sith's extreme characterization remains unchanged: her visual also declares that she cares little about humanity's future as long as she and the Commander survive.
Cu Sith is voiced by Shiori Izawa, designed by Nidy-2D-, and associated with hero music by Yunosuke. She is an Attacker with very low HP, high defense, and three distinct Hero Action forms through the NYARK unit.
Merunya Becomes a Cat-Witch With a Pumpkin Pouch
Merunya Lancelna's Halloween costume takes a more direct approach to classic seasonal imagery. Her black-and-purple outfit incorporates cat ears, maid-and-witch styling, a magical staff, and a small pumpkin-shaped pouch.
The design keeps the magic-school and spirit-user identity already associated with Merunya, but converts it into a softer Halloween aesthetic than the looks used for Cu Sith or Ura.
Her introduction also plays with trick-or-treat by asking “Sensei” to choose between candy and a prank. The character card then asks for one promise: that the person will continue to remain her “Sensei.”
Merunya is voiced by Yui Horie, designed by EB十, and associated with music by Satsuki. She is a late-blooming Gunner whose performance benefits significantly from attacking with an element that exploits an opponent's weakness.
Interestingly, Merunya's Halloween illustration had already appeared in a different context through the #COMPASS Cafe Halloween 2026 campaign. The official café site identifies Merunya, First, and Charles as making their first appearance in Halloween-costume illustrations for 2026 merchandise and novelties. That café/merchandise appearance is separate from the September 28 in-game costume implementation announcement.
The Official Video Brings All Four Costumes Into One Halloween Presentation
The main announcement also links to an official YouTube video specifically showcasing the Halloween 2026 lineup.
Presenting all four heroes together makes the contrast between their costume concepts clearer: Ura leans into dark onmyoji imagery, Amairo combines kitsune and witch motifs, Cu Sith adopts mechanical patchwork styling, and Merunya moves toward cat-witch fantasy.
Because this non-live video is the central audiovisual material behind the costume reveal, the article's image grid uses 12 frames from the Halloween 2026 video rather than store screenshots.
The video also provides the most direct combined look at the four outfits around their scheduled implementation after September 28 maintenance.
Why This Matters
1) Each costume still reflects its hero's identity
The Halloween theme does not reduce the four characters to generic seasonal designs. Ura still feels like an onmyoji, Amairo keeps her sword and kitsune mask, Cu Sith retains her mechanical equipment, and Merunya stays firmly connected to magic and spirit use.
2) Amairo and Ura receive more specific outfit naming
Names such as 滅紫家菊 and 紫黒大蛇 make their costumes feel like formal extensions of character lore and profession rather than a simple “Halloween Costume” label.
3) Merunya connects the café promotion with the game update
Her Halloween illustration was used in the #COMPASS Cafe campaign before the in-game lineup was announced, followed later by the September costume implementation news.
4) A dedicated video provides a fuller visual context
Instead of relying only on four static character cards, the official video packages the entire Halloween 2026 theme into one consistent presentation.
Game and Costume Information
For now, the additional important information currently known includes:
- the Japanese title is officially #コンパス 戦闘摂理解析システム
- the Halloween 2026 announcement was published through @cps_niconico
- the main announcement was made on September 27, 2026
- the lineup contains four heroes
- all four costumes were scheduled to appear after September 28 maintenance
- the main post does not list a specific maintenance-end time
- individual costume pricing is not included in the main announcement
- acquisition methods are also not explained in the main announcement
- an availability end date is not listed
- Amairo's costume is 討魔装衣「滅紫家菊」
- Ura's costume is 陰陽衣裳「紫黒大蛇」
- the verified Cu Sith post does not show a separate formal costume name
- the verified Merunya post does not show a separate formal costume name
- Amairo is an Attacker
- Ura is a Tank
- Cu Sith is an Attacker
- Merunya is a Gunner
- Amairo is voiced by Kana Hanazawa
- Ura is voiced by Mutsumi Tamura
- Cu Sith is voiced by Shiori Izawa
- Merunya is voiced by Yui Horie
- an official Halloween 2026 video is available on YouTube
- the video is not a livestream
- #COMPASS uses real-time 3v3 battles as its core gameplay format
- battles are designed around short matches and control of portal keys
- card decks form an important part of the strategy
- the game is basic free with paid items
- NHN PlayArt and DWANGO handle operation and development
- mobile versions are available on iOS and Android
- #COMPASS Cafe runs its 2026 Halloween event from September 1 through November 2
- the café uses Halloween costume illustrations for merchandise and novelties
- Merunya is among the characters specifically identified as making a Halloween-costume illustration debut in the café's 2026 lineup
- the café context does not by itself mean the costume was playable before the September 28 update
- official game information is available through the #COMPASS Official Website
- official updates are available through #COMPASS Official X
- the main announcement is available through the Halloween 2026 Official X Post
- the lineup video is available through the Official Halloween 2026 New Costume Video
- the Android version is available through #COMPASS on Google Play
Closing
Halloween 2026 introduces four new designs for Amairo, Ura, Cu Sith, and Merunya, with each costume built around the identity of its respective hero. The lineup was scheduled to appear after September 28 maintenance and received its own dedicated official video presenting this year's seasonal theme.
The main announcement confirms the designs and implementation timing but does not yet detail pricing, the acquisition method for each costume, or the end of their availability period. Those specifics require additional in-game or official #COMPASS information.
- #COMPASS Official X — Official Halloween 2026 Costume Announcement and September 28 Implementation
- #COMPASS Official YouTube — Official Halloween 2026 New Costume Video
- NHN PlayArt — Official #COMPASS Game Website, Platforms, and Service Information
- NHN PlayArt — Official Hero Profiles for Amairo, Ura, Cu Sith, and Merunya
- Google Play — Official #COMPASS Android Store Page
- #COMPASS Cafe — Official 2026 Halloween Event, Costume Illustrations, and Merchandise Information
