Yerin

Also known as Yerin Arelius

Major
First seen · Book 3 · Ch. 2

Gender: female
Age: late teens
First appears: Book 3 · Ch. 2
Books: 3

Yerin begins as a scarred, battle-hardened disciple of the Sword Sage, carrying his Remnant within her core, and evolves from a lone, deadly swordswoman into a formidable Underlord whose six silver sword-arms and Blood Shadow mark her as one of the most dangerous young sacred artists in the Blackflame Empire. Across the books, her combat prowess and spiritual perception deepen under Eithan’s tutelage, while her bond with Lindon shifts from training partners to romantic partners, and her internal struggle with the parasitic Blood Shadow becomes a central conflict. By the Uncrowned tournament, she stands as a recognized prodigy whose scars, sword-arms, and unyielding will embody both the legacy of her fallen master and her own rising legend.

Description

A sixteen-year-old girl with straight black hair cut sharply across her eyes and shoulders, her face and hands marked by pale scars from countless battles. She wears a tattered black robe cinched by a vivid blood-red rope belt, with a gleaming silver bladed arm extending from her shoulder like a scorpion's stinger. Her posture is always deadly and coiled, as though ready to strike at any moment. A human young woman with visible scars and sword-like Goldsign arms extending from her back. The arms are silver or steel-like; she can withdraw them, and at times manifests six. She is short, with her head reaching about another person's shoulders. Her hair is not otherwise described in the earlier appearance; after her advancement it grows past her shoulders and she cuts the strands from her eyes. She wears Skysworn armor in many scenes and also has black robes and a loose brown robe. After advancing to Underlady, her scars disappear and her Goldsigns look like actual steel blades growing on metal arms from her shoulders. A human young woman, about twenty, with long hair; its color is not established consistently in the supplied evidence. She has dark eyes and six silver sword-arms extending from her back as Goldsigns. In the tournament-era appearance, her skin is smooth and her scars are gone. She wears a black sacred artist’s robe and carries a white sword, often at her waist; she may wear a blindfold while training or fighting.

Connections

Family & partnersFriends & mentorsRivals

Wei Shi Lindonconflicting source relationships
Lindon transitions from a fellow disciple and training partner to a close companion and finally to Yerin's romantic interest, their bond deepening through shared advancement and emotional support across the books.
Akura Mercycompanion
Mercy joins Yerin’s circle as a teammate and companion during the Skysworn missions and tournament preparations.
Eithan Areliusconflicting source relationships
Eithan evolves from an adoptive mentor who pushes Yerin to integrate her Remnant into a father-figure who trains her in advanced combat and spiritual perception techniques.
BS
Blood Shadowconflicting source relationships
The Blood Shadow begins as a parasitic spirit that Yerin must contain and evolves into a bonded entity that provides combat assistance while remaining difficult to control.
MS
Min Shueiformer acquaintance
Min Shuei, the Winter Sage and former fiancée of Yerin's master, develops a complicated relationship with Yerin rooted in shared grief and differing expectations.
Jai Longopponent
Jai Long serves as an early opponent whose duel with Yerin marks her rise to Highgold; their conflict is resolved when he spares her life.
Sopharanatothrival
Sophara becomes Yerin's primary rival in the Uncrowned tournament, their enmity fueled by past clashes and Sophara’s desire for revenge.

Story so far

BOOK 3Blackflame
- Eithan adopts Yerin into the Arelius family and begins training her to integrate the Sword Sage’s Remnant.
- Yerin advances to Highgold during her duel with Jai Long on the slopes of Shiryu Mountain.
- She and Lindon train together in the Blackflame Trials and fight side-by-side against Orthos.
BOOK 6Underlord
- Yerin reaches the peak of Truegold and begins manifesting six silver-bladed Goldsigns.
- She bonds with the Blood Shadow, a parasitic spirit that grants her power but threatens her control.
- She competes as part of the Skysworn team alongside Lindon, Mercy, and Orthos.
BOOK 7Uncrowned (Cradle Book 7)
- Yerin enters the Uncrowned King tournament representing the Blackflame Empire.
- She clashes with rival Sopharanatoth, reigniting their feud over past grievances.
- Her relationship with Lindon deepens into romance while they are separated during the tournament.
- She trains under both Eithan and Winter Sage Min Shuei, refining her sword perception and combat style.