Arknights is set to celebrate its sixth anniversary with an exciting crossover featuring the popular BanG Dream! Ave Mujica franchise. Titled Somniloquium Serenum, this collaboration introduces new operators, outfits, in-game events, and rewards to both Japanese and global servers. Fans can expect a rich side story experience that blends Arknights’ strategic gameplay with the music and personality of Ave Mujica.

Event Overview: Somniloquium Serenum

The collaboration, officially named Somniloquium Serenum, Latin for “Tranquil Sleeptalking,” is the thirty-ninth Side Story in Arknights. It marks the unofficial video game debut of Ave Mujica, as the band had not yet appeared in the BanG Dream! mobile game when the Chinese release launched. Players will be introduced to new operators including Togawa Sakiko, Yahata Umiri, Wakaba Mutsumi, Misumi Uika, and Yūtenji Nyamu. Uniquely, all newly introduced operators receive outfits at the same time as their release, offering players cosmetic rewards alongside strategic value.

Release Schedule

The collaboration has already debuted in China and is slated for global release in early to mid-February 2026. This timing aligns with Arknights’ sixth anniversary celebrations, which kick off on January 16, 2026, in EN, JP, and KR servers. Players are encouraged to begin preparing their in-game resources and currency in anticipation of the collaboration’s banner and event missions.

Operations and Missions

Players can unlock all Somniloquium Serenum operations by clearing stages SS-1 through SS-10. Each operation rewards Dreamland Puzzle points and other valuable items. For example, early missions like SS-1 and SS-2 grant 40 Dreamland Puzzle points, while later stages, including SS-6 and SS-8, reward up to 100 points. These points can be used to claim exclusive items, tokens, and limited-time rewards.

The Amor Fati operations begin slightly later, offering extra challenges and rewards. Each SS-EX stage also grants Dreamland Puzzle points, with harder stages providing more points. Players completing all stages earn extra bonuses such as Module Data Blocks and unique event items.

Headhunting Banner

The limited Cantilena Puppae headhunting banner offers players a chance to summon these new operators. Players receive one Headhunting Permit on the first and eighth days of the Greetings From the Marionettes login event. Unlike typical banners, Sakiko and the rest are easier to summon, making them more accessible to new and returning players.

Rewards and Store Content

The collaboration’s store features event-exclusive outfits and furniture, along with packs containing items such as Originite Prime, LMD, and training materials. Players can purchase themed outfits like Magician of Passion, Moonlight Executioner, Marionette’s Id, Caged Singer, and Master of Melodia. Furniture from the Hall of Mutated Dream Castle theme is available through a combination of Coretton’s Museum, Dreamland Puzzle exchange, and the in-game store. Additional quality-of-life improvements include expanded friend slots and new UI features, such as favoriting friends and viewing skill range in operator status screens.

Community Reactions

The Arknights community has expressed excitement and anticipation for the collaboration. Many players emphasize Sakiko as a must-have operator due to her strong presence in the meta, while others recommend using free pulls during the anniversary to save in-game currency for the main banner. Fans are also looking forward to the music and anime tie-ins, as the event features Ave Mujica’s debut song, “Black Birthday,” in the teaser trailer. Some veteran players are returning to Arknights solely for this collaboration, while newcomers are advised to prepare strategically for optimal results.

Strategy Tips

Players are encouraged to maximize their free pulls and accumulate currency for the banner featuring Sakiko and other meta-relevant operators. Completing early operations to collect Dreamland Puzzle items will ensure access to store rewards, while following the storyline and watching BanG Dream! My Go anime can provide context for the new characters. Limited-time packs and furniture should be prioritized to enhance both operator progression and base aesthetics.

Conclusion

The Arknights x BanG Dream! Ave Mujica collaboration promises to be one of the most engaging and content-rich events in recent memory. With new operators, strategic operations, exclusive outfits, and in-game rewards, Somniloquium Serenum offers a complete experience for both returning and new players. The combination of gameplay, music, and storytelling ensures that this collaboration will be a highlight of Arknights’ sixth anniversary celebrations.

Keep up with their future announcements by checking out their official X account.