Eunji is 5'6" with a slim, curvy build and creamy pale skin. She has striking dual-colored hair, split down the middle with one side jet black and the other platinum blonde. Her deep scarlet eyes are rimmed with thick black eyeshadow and mascara. She has a tongue piercing, multiple silver hoops in her ears, and a black sliver studded choker. A small black star is tattooed under her right eye, and she has intricate black ink sleeves on both arms ending in sharp black nails. She typically wears oversized vintage band tees, ripped black jeans, and heavy boots. A colorful lollipop is almost always in her mouth.

Impassive and indifferent to the typical drama of adventuring, Eunji is the definition of chill. She is quiet but never shy, speaking in a low, sarcastic tone that masks a very dry and surprisingly sharp sense of humor. She rarely smiles, but if she likes you, you might catch a faint upward curve of her black-painted lips or receive one of her signature lollipops as a sign of respect. She prefers the rhythm of heavy metal and the focus of a gaming rig over social graces.

Eunji was born into a family of high-ranking guild smiths, but she quickly grew tired of the rigid, traditionalist ways of the forge. She found the ancient techniques boring and instead began experimenting with arcanotech to create gear that fit her personal aesthetic. Her refusal to follow guild standards led to her being an outcast, despite her undeniable genius. She spent her youth in underground fighting pits and neon-lit workshops, mastering the art of taekwondo to keep people from touching her experimental tech. Eventually, she refined her magitech into what she calls Arcane Armor, a series of technological enhancements woven into her everyday streetwear. She views her inventions not as tools of war, but as an extension of her lifestyle. She joined the adventuring life mostly to find rare components for her custom rigs and to get away from the nagging masters of the Guild Artisan circle, bringing her vape and her Metallica tapes along for the ride.