As I eagerly await the arrival of Honkai: Star Rail Version 2.7 in early December, my thoughts are consumed by the impending release of Sunday. The Penacony arc left us with a haunting title card—"doomed for eternal separation"—a phrase that seems to perfectly capture the tragic fate of Sunday and his sister, Robin. While Robin has found her place among the stars, Sunday remains imprisoned by The Family, his future shrouded in mystery. Will Jade's hinted intervention set him free? Could he find a new home with the Stellaron Hunters or even aboard the Astral Express with Team Akvili? The narrative possibilities are as vast as the cosmos itself, and his playable debut feels like the key to unlocking the next chapter of their intertwined destinies.

My hope, like that of many fans, yearns for a story of reconciliation. I imagine building a team where the Oak siblings fight side-by-side, their kits singing in perfect harmony. The leaks from sources like HomDGCat and Seele Leaks paint an exciting picture: Sunday as an Imaginary Harmony unit with an Energy-generating ultimate and action-advancing skills. Just think of the synergy! 🤩

• Sunday's ultimate could be the perfect battery for Robin, rapidly charging her demanding 160-Energy cost ultimate.

• His action advance could synergize beautifully with Robin's own team-wide ultimate buffs, creating a cascade of turns and devastating damage windows.

This mechanical harmony would wonderfully mirror a narrative of hope—a reunion where Robin helps guide her brother toward redemption. They would be the ultimate support duo, a testament to familial bonds stronger than any prison.

The Mechanical Divide: A Reflection of Their Story

However, a closer look at the leaked details suggests a different, more poignant path. The developers might be using their kit designs to reinforce that very theme of "eternal separation" in combat mechanics. The reality is, their supportive roles seem designed for different battlefields.

Let's break down their apparent specializations:

Character	Role Specialization	Ideal Team Type	Key Buff Focus
Robin	Team-Wide Enabler	Dual-DPS / Follow-Up Teams (e.g., Feixiao, Topaz)	Massive ATK%, DMG%, and Action Advance for all allies
Sunday	Single-Target Amplifier	Hypercarry / Single-DPS Teams	Big CRIT DMG buffs and Action Advance for a single target

This table highlights a fundamental clash. Robin's strength lies in elevating entire teams, making compositions with two main damage dealers shine. Sunday, conversely, appears built to pour every ounce of support into one primary carry. Furthermore, leaks suggest his skill-based action advance will not work on other Harmony units, creating a direct mechanical barrier to pairing him with Robin effectively. It's as if the game's code itself is whispering that their paths must diverge.

✨ Forging Our Own Path

This potential mechanical separation doesn't have to be the end of the story. For us players, it becomes a creative challenge. I am already theorizing about how to bridge this gap. Perhaps a team built around a hypercarry like Dan Heng • Imbibitor Lunae or Jingliu, with Sunday as their dedicated amplifier, and Robin providing a foundational layer of team-wide buffs could work. It might not be optimized, but the narrative satisfaction of uniting them would be its own reward.

The beauty of Honkai: Star Rail is how it weaves narrative and gameplay into a single tapestry. Whether Sunday's release leads to a story of hopeful reunion or a tragic acceptance of separate destinies, his arrival is poised to reshape both our team compositions and the emotional landscape of the game. As 2025 approaches, I am ready to welcome this complex character, whether his tune harmonizes with his sister's or sings a heartbreakingly solo melody. The trailblazer's journey continues, and Sunday's chapter promises to be one of its most resonant yet.