Developer’s Note – New Character Lumi Introduction and Update Plans
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Greetings, Swordbringers!
This is the Lost Sword Development Team.
Today, we have prepared this Developer’s Note to introduce the new character Lumi and share our upcoming update plans, including Elemental Passage, Batch Sweep, and more.
The stronger the light shines, the deeper the shadows grow.
The same was true for the Aurelia Principality, a nation that had achieved dazzling progress through magical engineering.
Beneath the city adorned with the lights of magical engineering, the slums known as “Gray End,” built within abandoned dungeons, were nothing but perfect ash-gray.
It was the very edge of the abyss, where rats that had never seen the sun fed on corpses soaked in sewage, only to be eaten in turn by insects.
In that colorless world, young Lumi discovered a fairy tale book that had drifted into the sewers.
Within that fairy tale book, young Lumi found a certain “color” she had never seen in Gray End.
It was only a few pages long, faded and stained, but its colors were still bright enough to sting the eyes.
It was not the purple of bloated corpses, nor the green of damp moss, nor the red of dried blood.
It was pink, a color that existed nowhere in that underground world.
A brilliant world where flocks of sheep made of cotton candy wandered through the sky, and a princess trapped inside a cookie castle waited for a knight in candy armor.
The shock felt fresh, almost like a revelation.
And then she realized something.
Just as one broken window could eventually leave an entire city in ruin, this gloomy scenery was rotting away people’s hearts as well.
Because Lumi had been forced to grow up far too quickly, she still carried within her the wisdom known as childlike innocence.
“Then why don’t I just create the world from the fairy tale myself?”
From that day on, Lumi named her blunt weapon “Squishy” and began painting this ash-gray world with an aesthetic that seemed to belong in a fairy tale.
One day, she tore off a criminal’s leather clothes and forcibly dressed them in bright pink.
The next day, she gave them ridiculous nicknames like Cotton Candy and Floaty, then forced them to become her friends.
At first, it was surely forced. The sight of menacing figures cleaning the streets in pink outfits was bizarre, to say the least.
But after ten days passed, and then several months, the area controlled by the “Pink Knights” had become unbelievably clean and safe.
Even if they looked ridiculous on the outside, the colors she conveyed with sincerity were clearly pushing back the gray despair.
New Character: Lumi, the Pink Queen of the Underground
Lumi is the leader of the “Pink Knights,” a criminal organization active in the slums of the Aurelia Principality.
Lumi is a Front-position Shock Knight who delivers electrifying blows that shock her enemies.
Lumi's Animations
Lumi’s Unfortunate Defeat Animation
Lumi’s Ultimate Skill
https://reddit.com/link/1txb8el/video/kw12wi47fd5h1/player
Lumi Pet
Lumi Ability Card
Lumi’s Costume: Heart Strike
A costume that fully captures Lumi’s refreshing charm will also be released at the same time.
A pink light home run into your heart-!
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Elemental Passage
We would like to share more details about Elemental Passage, which was introduced in the previous Developer’s Note.
Elemental Passage is content where a dungeon of one element opens each day of the week.
The element opened for each day is planned to follow the same schedule as the currently available Boss Raid.
Elemental Passage will be unlocked for each element after clearing the 10F of the corresponding element’s Elemental Stone Dungeon.
The number of stages that can be cleared each day will be limited to around 3.
Each dungeon can only be entered with characters of the same element as that dungeon.
However, Holy-element characters are being prepared as an exception so that they can also be assigned to dungeons of other elements.
When assigned to a dungeon of another element, up to 1 Holy-element character can be included.
Conversely, in Holy-element dungeons, we are preparing the system so that 1 additional character of any element can be assigned alongside Holy-element characters.
Rewards from Elemental Passage are planned to include growth materials such as Elemental Stones and Gold.
In addition, achievement rewards based on cumulative cleared floors are also planned, including Training Reset Ticket and Gem Transformer Ticket.
Elemental Passage is planned to be added through the first update in June.
Batch Sweep System
To improve convenience for dungeon content that needs to be swept repeatedly every day, we are developing the “Dungeon Batch Sweep” feature.
Previously, each dungeon had to be entered individually to proceed with sweeps, but with this feature, stages and sweep counts for target dungeons can be set in advance through the Dungeon Batch Sweep pop-up, allowing multiple dungeons to be swept at once with a single button input.
Through this, we expect repeated actions to be reduced, making daily dungeon content more convenient to use.
The Batch Sweep system is planned to be added through the second update in June.
Select Pickup System
As the number of characters continues to increase, we have received many opinions from Swordbringers who feel burdened by pickup events.
In the second update in June, Select Pickup Summon is planned to be added.
In Select Pickup Summon, a desired character can be selected directly from among several characters designated as Select targets, and the selected character can be changed to another character at any time during the event period.
The pity count for Select Pickup Summon will be shared with the existing Character Pickup Summon.
In addition, even if the Select Pickup target is changed, the previously accumulated pity progress will be maintained, allowing Swordbringers to choose and summon the character they want without additional burden.
Closing Words
We sincerely thank all Swordbringers for always showing love and interest in Lost Sword.
The development team and publisher are both carefully reviewing the feedback and suggestions sent by Swordbringers.
We will continue working to improve areas that need attention more quickly and repay your support with a better experience.
Starting from the next Developer’s Note, we plan to share details one by one about the content being prepared for the upcoming 1st Anniversary update.
We will do our utmost to ensure that we do not answer the expectations of Swordbringers with disappointment.
Thank you! 🙇🏻🙇🏻🙇🏻
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Posted Jun 5, 2026, 5:01 AM UTC