Under the skirt is her iconic light purple tights with dark purple stripes. Near the top of her waist is a long black/purple bow. A gold design that resembles a leaf adorns the hem. She wears a long black dress that reaches her knees and the color of the dress changes toward the hem from a deep black to a midnight purple. She now appears to have an astronomical theme. Originally, Yukari's design was based on the legend of the moon rabbit.

It can also mean 'violet' in relation to her color scheme. Her given name, 'Yukari', is from connection or relation. Her family name, 'Yuzuki', is derived from the words connect and moon.

Yukari's illustrator, Juu Ayakura, noted that Yuzuki Yukari Rei was designed with a more mature impression and changed the shape of Yukari's hairstyle with a 'special overnight stage costume' theme in mind. She, along with Kizuna Akari, have an astronomical theme along with the idea of connecting people. She was developed as an adult or mature sounding vocal. As such, Yukari had a lot of focus from the team for a number of years and this helped diversify her voice greatly. They focused on growing the character and vocal in a variety of different ways. The team kept Yukari the focus for the first 7 years, only touching upon their next vocal on Yukari's 5th anniversary. According to VOCALOMAKETS member, Kagome-P, she is a cup size A or B. Her age, weight, and height were supplied in 'ボカロPlus vol.4'. She is loosely inspired by the legend of the Moon rabbit. The English title is 'She unites you all with her voice'. The concept for Yuzuki Yukari is 'People who are related to the VOCALOID connect the sounds/moon to one another,' (VOCALOIDに縁のある人達が音（月）を結ぶ).

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