On March 28, 2019, Ddickky posted on Weibo that two Xingchen voice databases were being planned for Synthesizer V. She was later noted to be a part of MEDIUM⁵. Throughout her development and time as a VOCALOID, Xingchen received a complete redesign and a character biography. in collaboration with Beijing Photek S&T Development Co., Ltd. She was later renamed to 'Xingchen' upon announcement of her VOCALOID4 voicebank production, which was developed by Shanghai HENIAN Information Technology Co. Xingchen was originally conceptualized as 'Quadimensionko', a mascot for the Quadimension doujinshi album series and group.

She was originally known as 'Quadimensionko'. 'Stardust' is her official English name as it appears on her boxart, numerous promotional material, and is utilized on her official social media accounts. Her name, Xingchen (星尘 Xīngchén), means 'Stardust' in Chinese. Xingchen and ZERO were both one person and not one person, somewhere in between, representing the past and the present. It was noted that out of all five derivatives, Xingchen looked and sounded the most like ZERO, as ZERO was based on the original Quadimensionko concept due the the company's fondness for the initial design and was repurposed. In March 2019, Xingchen was revealed to be part of the MEDIUM⁵ cast and was one of the girls who derived from a single being known as ZERO who possessed Metatron's Cube. In the artbook for Fairytale released in 2019, the attribute for the star tetrahedron was labelled as 'sacred' or 'holy' (神圣). This was later confirmed to be an influence to her overall character concept, especially during her time as Quadimensionko. The star tetrahedron represents the human body, heaven and earth, or aether, and is a shape found in Metatron's Cube. This shape is also present on the left corner of her dress and as the third stroke of '星' in her logo. One of the most prominent aspects for Xingchen's character and design is that she carries a yellow star tetrahedron (also known as a 'double tetrahedron'). Her birthday was later confirmed to be August 12.

However, it was noted that she does not necessarily need to flap her hair while flying in space. Īccording to the Quadimension 3 album artbook and November's design concepts, Xingchen is capable of flying to Earth by using her hair. Xingchen was originally a mascot for the doujinshi group and series Quadimension.

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