Vocagender or VOCALOIDgender is a gender directly tied to the VOCALOIDs that exist as avatars for voicebanks of the VOCALOID software. Being vocagender/VOCALOIDgender means that a person feels that their gender is connected to or influenced by a certain VOCALOID, VOCALOIDs, or by VOCALOIDs in general. This can also count FANLOIDs or UTAUs.
Flags
The first flag represents Hatsune Miku, Kasane Teto and Akita Neru, a triad of voice synthesizers which sung in the classic VOCALOID song, "Triple Baka".
An alternate flag has stripes representing Hatsune Miku, Kagamine Rin, Kagamine Len, KAITO, Megurine Luka, and MEIKO, the six Cryptonloids (VOCALOIDs made by the company Crypton Future Media) and six most popular VOCALOIDs in general.
Another alternate flag was created by discord user zuos, 19th September 2021. White represents the technological aspect of VOCALOID/the program itself, red represents the VOCALOIDs MEIKO & Fukase, yellow represents the VOCALOIDs Kagamine Rin & Len, blue represents the VOCALOIDs Hatsune Miku & KAITO, and purple represents the VOCALOIDs Flower & Camui Gackpo. The colors can also be associated with other VOCALOIDs or UTAUs/FANLOIDs, if one pleases.
Notes
Akita Neru and Kasane Teto are not VOCALOIDs, despite being often confused for being so. They are an UTAU and a FANLOID, respectively.