The whispers from the data mines are growing louder, and they're all about a certain angelic figure from Penacony. A fresh leak concerning Honkai: Star Rail has shed more light on the highly anticipated character, Sunday, who is poised to transition from a pivotal NPC to a playable unit in the near future. Since its launch, the game has maintained a steady rhythm of introducing fresh faces, typically two new five-star characters per update. The current Version 2.4 brought the sword-wielding Yunli, with the Foxian healer Jiaoqiu waiting in the wings for the update's second phase. But the community's gaze is fixed further ahead, on a character whose name has been on everyone's lips for months.

The Harmony of a Familiar Face

Sunday is no stranger to Trailblazers. He's been a central, if enigmatic, presence on the Planet of Festivities, Penacony, primarily known as the protective older brother to the songstress Robin. According to credible leaks from sources like Sakura Haven, this familiar face will soon join the roster by walking the Path of Harmony. This is a significant revelation, as Harmony characters in Honkai: Star Rail are the master orchestrators of battle, specializing in empowering their allies with powerful buffs and synergistic effects. It seems Sunday's role will be one of support, guiding his team to victory from the sidelines—though perhaps not as peacefully as one might expect from his serene appearance.

A Darker Transformation Awaits

Get ready for a makeover, because insiders suggest Sunday's playable version is going to look quite different. Say goodbye to the pristine, angelic white uniform he sports as an NPC. Leakers hint at a much darker, more imposing outfit for his combat-ready form. This visual shift hints at deeper layers to his character, perhaps reflecting a different side of the Penacony representative we've yet to fully see. It's a classic case of 'don't judge a book by its cover,' or in this case, don't judge a Harmony character by their heavenly robes.

The Power of Imagination

When it comes to the element he'll command in battle, previous rumors and the latest leaks seem to converge on one type: Imaginary. If this holds true, Sunday would join the ranks of powerful Imagary-wielding supports, bringing a unique blend of utility and damage potential to the element. The synergy between his supportive Harmony Path and the versatile Imagary element could make him a formidable and flexible addition to many team compositions.

The Release Date Tango

Ah, the million-credit question: When will he finally get here? The timeline has been a bit of a moving target. Early whispers placed his debut in the distant Version 2.7. However, the latest buzz from the leak community suggests a much sooner arrival. The current prediction points squarely at Version 2.6, expected in late October 2026. This lines up with the game's established update schedule and the information vacuum surrounding that particular version.

We can say with certainty where he won't be: Version 2.5. HoYoverse has already unveiled that update's stars. The first banner phase, starting around September 9th, will feature the new five-star Feixiao, alongside a rerun banner where players might choose between fan-favorites like Robin, Kafka, or Black Swan. The second phase, arriving near September 24th, will introduce the healer Lingsha, with the illustrious Dr. Ratio featured as the limited rerun.

So, for all the fans waiting to recruit the brother from Penacony, the wait might be shorter than feared. The pieces of the puzzle are coming together: a Harmony Path supporter, an Imagary element user, with a dramatic new look, potentially touching down in the autumn of 2026. It's a compelling package that has the community abuzz with theorycrafting and anticipation. Only time—and the official announcements from HoYoverse—will confirm if these celestial whispers hold true. One thing's for sure, the roster is about to get a lot more... harmonious.

Data referenced from Sensor Tower helps frame why leaks like Sunday’s rumored Harmony/Imaginary kit and late-2.6 window can meaningfully influence player behavior: highly anticipated five-star supports often correlate with increased pre-banner engagement, return logins, and monetization spikes as players stockpile pulls and reassess team investments ahead of a major release.