Yerin is the companion of Wei Shi Lindon and the apprentice of the Sage of The Endless Sword. Yerin and Lindon are adopted disciples of the Arelius Family under the order of Eithan Arelius. On top of that she has also joined the Skysworn.
She is said to look thin and scruffy to the point she looks like she has spent the past while camped out in the woods. She cuts her own hair with sword madra in a perfectly straight line to minimize its interference in combat. Initially, she wears a tattered black sacred artist's robe with a thick red cord tied around her waist. Her skin is covered in thin white, regular scars from practicing the Endless Sword technique.
After ascending to Underlady, her scars were wiped away and her hair grew past her shoulders.
After becoming a herald and fusing with her blood shadow her eyes, her goldsigns, and one lock of her hair turned crimson.
Yerin is known to be an intense person with scathing remarks and a sharp tongue. She is often insulting or teasing people/objects for no apparent reason. She also despises her Blood Shadow, as it has murdered many innocent people. She also cared greatly for Lindon, and would throw herself into battle to save him. In Underlord, it is revealed that the reason she practices sacred arts is so she never has to go through the pain of losing someone important to her ever again.
Yerin was known to be a genius in her hometown before everyone was slaughtered by her Blood Shadow. Afterward, she held it down and stopped it from attempting to kill the Sage of the Endless Sword. Although he was completely safe, he was impressed by her willpower and natural talent, and chose to take her on as his apprentice, which caused the sages marriage plans to be thrown off. He challenged her and caused her many injuries and scars, taking her around the continent for training. Near the end of his life, he took her to Sacred Valley to keep her safe from the wider world. After his assassination at the hands of the Heaven's Glory sect, she was driven out of the temple they were using as a base. She met Wei Shi Lindon, avenged her master, The Sage of The Endless Sword, and used his Remnant to ascend from Jade to Lowgold.
Powers and Techniques
Yerin is a top-notch sacred artist on the Path of Endless Sword who is consistently able to defeat opponents of a higher level of advancement, or multiple opponents of her level.
Notable Opponents and Duels
While a Lowgold in Soulsmith, Yerin was able to defeat 3 other Lowgolds who tried to attack Lindon. In Blackflame, Yerin as a new Highgold was able to give Jai Long, a Truegold, fear for his own safety until he decided to escape. As a Truegold in Underlord, Yerin (along with her newly advanced Blood Shadow clone) was able to simultaneously fight both Kiro and Meira, Underlord-level opponents, at the same time. The outcome was that Kiro was heavily wounded and the underlords had to escape. After advancing to Overlady/Herald in Wintersteel, she defeats Sopharanatoth with ease, winning the Uncrowned tournament and gaining Penance. She then shortly thereafter uses it to kill Seshethkunaaz, the Monarch of Gold dragons.
Steelborn Iron Body (link): Yerin's special Iron Body grants her superhuman strength dramatically beyond that of a normal Iron Body.
Sword Sage's Remnant: Yerin is bonded to the Sage of the Endless Sword's remnant. This grants her multiple other retractable limbs that end in swords, as well as access to some of the Sage's memories. Additionally, it has helped her touch the Sword Icon, connecting her to the Way, and greatly honing her spiritual sense.
Blood Shadow (Ruby): In Underlord, Yerin gains the ability to release her Blood Shadow, who is able to fight as an independent copy of her with all of her skills and abilities. She is well coordinated with her Blood Shadow. Yerin's control over her Blood Shadow and her resistance to it as a young child made her unique enough for the Sword Sage to choose her as an apprentice. During the Uncrowned tournament, her Blood Shadow has become its own sentient entity with feelings and desires and even took up the name Ruby. The Sage of Redmoon Hall, whose path she adopted to control the Blood Shadow, implies that she has made progress farther than even himself with Blood Shadows. After failing to grasp the Sword Icon completely and advance to Sage, Yerin and Ruby form a contract to merge into one entity before their final round against Soparanatoth. This advances Yerin to Herald, though called a pseudo-Herald by Akura Charity, as she has not yet reached the Archlord. Merging with Ruby is a significant turning point for Yerin as she no longer seeks to become the next Sage of the Endless Sword.
Diamond Veins Elixir: In Uncrowned, Yerin received the Diamond Veins Elixir from the Arelius family. This significantly strengthened her madra channels so she is able to use stronger techniques, and use them more often.
Path of the Endless Sword
Yerin was taught the Path of the Endless Sword (link) by the Sage of the Endless Sword.
Path Techniques: Enforcer, Striker, and ruler.
- Flowing Sword (Enforcer): sword aura is collected from the surrounding area with every movement of the sword. This technique strengthens Yerin's strikes as the fight progresses.
- Rippling Sword (Striker)sends out a wave of sword aura it can be launched from her remnant arms at her back
- Endless Sword (Ruler): waves of sword madra emanate from Yerin, cutting anyone and anything caught nearby. Any bladed edge caught in this technique will emit sword madra of its own, setting up a potentially deadly chain reaction. In Ghostwater, Yerin learns to control this better.
- Hidden Sword (Forger): Forges a sword that is invisible edge on. More advance uses include running on multple forged swords. Yerin can forge sword madra, although she does not use it in combat. Her master could also embed this technique with will as a Sage that allowed it to attack independently.