Yuka Takeuchi, a Japanese karate practitioner, specializes in Kyokushin Karate and ki manipulation, skills honed by her grandfather following her parents' death in childhood. Standing 163 cm tall, she has brown eyes and brown hair usually styled in a ponytail, with measurements of bust 89 cm (E-cup), waist 59 cm, and hips 88 cm. She works as a waitress at the family restaurant Hannah Millers, alongside her longtime best friend Satomi Yajima.

Yuka enters the Variable Geo tournaments seeking self-improvement and to test her skills against strong opponents, prioritizing this over monetary or real estate rewards. Her virtuous approach and outgoing personality foster friendships with fellow fighters like Chiho Masuda, Jun Kubota, and Satomi Yajima. Across game installments, her "shoto-clone" fighting style features signature special moves: the Kikodan (full-screen fireball), Idatensoku (spinning roundhouse kick), and Soryugeki (rising uppercut), culminating in her Super Art, the Kiryu Idatengeki combo. Games like Super V.G. highlight her offensive pressure, fast projectiles, and invincible uppercut, though she possesses weaker throws and the Soryugeki exhibits unreliable hitboxes against grounded opponents.

In novel adaptations, Yuka initially appears as a side character or mid-boss. One storyline details her humiliating defeat against Miranda's cyborg, where her bra is forcibly removed during combat. This drives her to rigorous training for a rematch against Miranda, evolving her into the central protagonist by the final volume. The OVA continuity positions her as the main protagonist who defeats reigning champion Reimi Jahana, prompting Reimi's reformation and subsequent quest to reclaim the title. Later media, such as V.G. Neo, features her competing under the alias "Misty."