SeeU is a Korean VOCALOID developed and distributed by SBS A&T (formerly SBS Artech), and was released in October 2011 for South Korea and later in December for Japan. Her voice is provided by Korean female singer, Dahee Kim, a member of the K-Pop idol group, 'GLAM'. Dahee recorded in Korean and Japanese for the two voicebanks.
SeeU was given a moe-esque design and is aimed more specifically to the general and VOCALOID Otaku fandom. SBS stated that SeeU was created to be a "cute and lively yet mysterious looking 17 year old girl." Her outfit was designed with a school uniform in mind. Her official illustrations and design was created by KKUEM.
Her cat ears/nekomimi are speakers. According to her illustrator, they are actually detachable Her neckband is a CD player. Soundwaves light up on the rectangle of her flat-shoes and on the upper part of her top (chest). There's a pause button at the back of her clothes, a power button on the ribbon of her neckband and an "on" button on one of the buttons at the front of her top. During a virtual interview starring SeeU conducted by SBS, SeeU revealed her clothing size to be XXS.