Vital statistics
Age Unknown
Debut Chapter 8
Occupation Illegal hacker
In-Game Job Swordsman
Family Father (Deceased)
Mother (Deceased)
Weapon Daggers
The creator of the original Yureka. She initially sought Elca out in order to become her partner as a killer for the sake of avenging her parents, who committed suicide after being pushed into a corner. She also admires, and gradually fell deeply in love with, Jang-Gun after watching his adventures through Yureka secretly

Jae-ha is a skilled hacker and used her abilities to create an advanced program capable of creating AIs based on people. Her program was responsible for the creation of Yureka and Neogia and the recent addition of the Lotto A.I., this time not based on Jahea herself, but on Jang-Gun. This technology is highly sought-after by corporations such as Dexon. She becomes comatose after an attack with Elca, by sacrificing herself to save Lotto.


Jaeha is emotionally unstable, due to witnessing her father murdering her mother and committing suicide afterward. She was initially interested in Lotto after passively watching his adventures through Yureka, but gradually fell in love with him to the point of obsession. She eventually retreated into her mind when Lotto rejected her and only came out when Lotto called her name out.


Background Edit

Jaeha originally lost her parents when they committed dual suicide, and she vowed to take revenge. She became a hunter with the intention of switching to a killer. When she encountered Elca she joined forces to learn the ways of killing, though she never had killed anyone before or as of yet.


Hunting at Terror Tower Edit

Jae-Ha is first seen in the multiscanner room, naked in the Cyber Cafe, as Jang-Gun opens the door. He closes the door, but doesn't pay attention, knocking himself backwards from the surprise. She then gets dressed, accidentally dropping the Yureka ID card, and goes to Woon-Ha to get her card renewed. She looks over to see Jang-Gun avoiding looking at her directly, nervously, she simply smiles at him. She then leaves, thanking Woon-Ha.

Meeting Basara Edit

While Jang-Gun investigates about the Jae-Ha, Woon-Ha mentions that she requested copies made of her card in case she loses one.

Doubles Tournament ArcEdit

She makes a brief appearance watching the tournament on a tv on display.


When Jaeha takes control of Yureka, the skills exibited are far beyond any normal player.

  • Security Field: Prevents players from logging off
  • Switch: Capable of swapping places with any other player
  • Prediction: Allows her to predict the moves of her opponent and counter them.
  • Maxed Stats: All of her stats are at the maximum level.

Gallery Edit


Jae-Ha holding ID card. Chapter 8 cover.