The Honkai: Star Rail community is abuzz with the latest revelations surrounding one of the game's most anticipated characters, Sunday. Leaked information has provided a comprehensive look at the kit for this upcoming five-star Imaginary unit who follows the Path of Harmony, setting the stage for his debut in the anticipated Version 2.7 update, projected for early December 2025. Known within the game's lore as the older brother of the beloved singer Robin, Sunday has been a central figure in the main narrative and has already challenged players as the formidable boss, Harmonious Choir - The Great Septimus. Now, players are getting a glimpse of how he will function as a playable ally, with his abilities suggesting a powerful, summon-centric support role that is already sparking intense discussion among the player base.

📜 Detailed Breakdown of Sunday's Abilities

The leaked details, sourced from beta information, outline a kit designed to empower allies through action manipulation and critical stat buffs. Here is a structured overview of his reported skills:

Basic Attack & Technique

While specifics on his basic attack are not fully detailed, his Technique is reported to provide a substantial team-wide buff. Upon using his Technique, all party members receive a 50% DMG increase for two turns, offering a powerful opener for challenging content like Memory of Chaos or the new Apocalyptic Shadow stages.

The Core Skill: "Action Transfer"

Sunday's Skill is the cornerstone of his supportive utility. It allows him to transfer an action to a chosen ally, immediately letting that character take a turn. This action comes with significant offensive enhancements:

• Base Damage Boost: Grants the target a 40% damage increase for two turns.

• Summon Synergy: If the targeted ally controls a summon (e.g., Topaz's Numby, Herta's puppet), the damage boost receives an additional 40% increase, culminating in a massive 80% damage bonus.

• Path Restriction: Notably, this action transfer effect will not trigger if the chosen ally is already a Harmony character. This design likely prevents infinite action loops and encourages diverse team compositions.

The Ultimate: "The Beatified"

Sunday's Ultimate focuses on energy restoration and critical damage amplification. It restores 20% of maximum Energy to a single teammate and applies a unique status called "The Beatified." This effect scales with Sunday's own build, as it increases the target's CRIT Damage based on Sunday's CRIT Damage stat. This makes Sunday an excellent partner for hyper-carry DPS units like Dan Heng • Imbibitor Lunae or Jingliu, significantly amplifying their burst potential.

Talent: "The Sorrowing Body"

Complementing his Skill, Sunday's Talent, "The Sorrowing Body," provides a 20% CRIT Rate buff to the ally affected by his Skill. This synergizes perfectly with the CRIT Damage boost from his Ultimate, allowing players to build their main damage dealers with a greater focus on CRIT Damage substats while Sunday covers the CRIT Rate requirement.

⚖️ Community Reaction and Meta Implications

The leak has ignited a polarized debate within the player base. A significant portion of the community has drawn immediate comparisons to Bronya, the game's premier Harmony support, labeling Sunday as a "superior" or "enhanced" version. The parallels are evident: both manipulate action order and provide substantial damage buffs. However, Sunday's unique niche lies in his potent synergy with summon-based characters. This makes him a potentially best-in-class support for units like:

• Topaz & Numby

• Herta (with specific setups)

• Future summon-centric characters

This specialization has led to mixed feelings. While some players are excited about enabling new team archetypes, others express concern that his kit might be too niche, limiting his versatility outside of summon-heavy teams. The restriction on buffing other Harmony characters is also a point of strategic consideration, preventing certain support stacking strategies.

⚠️ A Note on Reliability and Future Adjustments

It is crucial to treat these leaked details with caution. As with all beta information, HoYoverse retains the ability to make significant adjustments to Sunday's multipliers, mechanics, or even core abilities before his official release. The community has seen numerous examples where characters underwent substantial changes between initial leaks and their live server debut. Players should view this information as a promising preview rather than a finalized product.

🗓️ Expected Release Timeline

Following Honkai: Star Rail's consistent update schedule, Version 2.7 is expected to launch around December 3, 2025. Sunday has been officially confirmed alongside another new five-star character, Fugue, for this update. Players should begin saving their Star Rail Special Passes and Stellar Jades if they wish to secure this unique Harmony support upon his arrival.

🎯 Strategic Preparation and Team Building

For players planning to pull for Sunday, early considerations for team building and relic preparation can be made:

In summary, Sunday is shaping up to be a transformative support character who carves out a distinct niche within the Harmony path. His ability to empower summon mechanics and provide robust critical stat support positions him as a potentially meta-defining unit for specific team compositions. As the development for Version 2.7 continues, all eyes will be on HoYoverse for the official confirmation and any potential tweaks to this highly anticipated brother of Robin.