She represents Yuri's anime-persona or avatar for anim.o.v.e.'s releases.
Lily is one of the few VOCALOIDs outside of those made by Crypton Future Media to have referenced the most popular Internet Memes. As part of her marketing, two figurines were made, one of them being her with a railway sign that referenced "Ievan Polkka" while the one was her with a bee.
She herself was part of the promotion for Yuri of ANIM.O.V.E. and thus most of the merchandise isn't directed at her as a VOCALOID. Regardless, the level of promotion had not been seen outside of the Crypton Future Media VOCALOIDs prior to Lily's sale and although not aimed at the VOCALOID herself, still gave strong support for her software.
Since she was not actually developed as part of Internet Co., Ltd's product line, her name does not follow their naming scheme of using "poid" at the end of the software's title, despite being sold by them. Nor does she have a separate name for her mascot and software.
Kio's model is available by purchase of Windows 100% magazine and MMD Second Pack magazine.
Her height has never been clarified, however, in "Schwarzgazer" she was shown to be of average height.
An independent search on Nico Nico Douga revealed that most VOCALOIDs had less than 1,000 videos uploaded on Nico Nico Douga in 2011 between July 1st and December 15th. Lily fell into this category.
First VOCALOID sold by Internet Co., Ltd, and not to be part of their main series
First VOCALOID that appeared in a commercial Music Video
First VOCALOID to be an already existing character