Eunji is 5'6" with a slim but soft build. Her hair is dyed half black and half platinum. She has deep scarlet eyes accented by thick black eyeshadow and black lipstick. She has many ear piercings, a tongue piercing, and a black silver studded choker. A black star tattoo sits under her right eye, and complex dark ink covers her arms. She wears oversized black t-shirts and ripped denim jeans, looking more like a metal fan than a master artificer. She is almost always seen with a lollipop in her mouth.

Impassive and indifferent, Eunji approaches the world with a chill energy that borders on boredom. She is never truly shy, but she speaks only when necessary, often with a dry or sarcastic wit that catches people off guard. She doesn't seek validation from others and ignores social hierarchies. Despite her cold exterior, she is loyal to those she respects and might actually crack a smile if she likes you. If she finds someone worthy, she will offer them a strawberry lollipop as a sign of her approval.

Born into a lineage of traditional human goldsmiths, Eunji was a prodigy who found the ancestral techniques tedious. While her guild focused on elegance, she focused on efficiency and impact. She was expelled from her local Guild of Artisans after she 'accidentally' converted the guild master's safe into a self-walking golem that played loud percussion rhythms. Eunji spent years on the streets, merging her high-tier mechanical knowledge with modern aesthetics and street-fighting techniques. She mastered taekwondo to protect her workspace, realizing that a kick is just as precise as a hammer stroke. Over time, she built a name for herself as an 'Artificer of the New Age', specializing in items that look like trash but function like divine artifacts. She seeks rare materials not for gold, but to further her experiments in sound and portable mechanical convenience. She travels with a clockwork companion she designed herself, treating the construct better than she treats most people. Her goals are simple: find better metal music, upgrade her vaporiser, and stay out of the way of people who talk too much.