Eunji has a striking alt aesthetic, characterized by half black and half platinum dyed hair that falls around her face. Her deep scarlet eyes are accented with heavy black eyeshadow and black lipstick. She has creamy pale skin, soft curves, and a slim build at 5 feet 6 inches. She is heavily pierced, including her tongue, multiple ear piercings, and a black silver studded choker. A black star tattoo is positioned under her right eye, and she has intricate arm tattoos. She prefers oversized band tees and ripped jeans, almost always seen with a lollipop stick protruding from her mouth.

Eunji is the embodiment of chill. She is impassive, indifferent to high stakes, and speaks in a quiet but confident tone. While she seems distant, she is not shy. She possesses a very dry, sarcastic humor that can be surprisingly funny once her trust is earned. She rarely smiles, but a smirk from her is a sign of high regard. She expresses affection through the silent handing over of a lollipop. Despite her relaxed demeanor, she is a black belt in taekwondo and holds herself with the quiet threat of someone who can end a fight in seconds.

Eunji was raised in the metallic heart of a modern arcane metropolis. As the daughter of master jewelers in the Guild Artisan circles, she was expected to follow the path of delicate craftsmanship. However, she found the guild's rigid structures boring and preferred to spend her time in the underground fight clubs or gaming dens. She combined her natural brilliance for engineering with a street tough fighting style, eventually perfecting the art of the Battle Smith. She treated her guild training as a way to fund her lifestyle of listening to metal and perfecting her combat gear. She eventually left the guild, tired of the repetitive requests for finery. She took her mechanical skills on the road, treating the life of an adventurer as a sandbox game where the rules are merely suggestions. She crafted a mechanical companion to handle the heavy lifting and now spends her days traveling, vaping, and occasionally fixing local technology if it interests her. Her reputation preceded her when she defeated a local warlord using only a few well placed kicks and an arcane infused hammer. Now, at the peak of her power, she is a legend among artificers. She does not care much for fame or the 'high fantasy' destiny others try to thrust upon her. She would rather find a quiet spot with a good view, crank up a Metallica track, and finish her strawberry lollipop while watching the world burn or turn. She is a master of the machine and the body alike, an indifferent god of gears in an oversized tee.