do you know anything about ausgris? they were meant to be a vocaloid by vocatone, and also was agender, meaning they could have beat hime and mikoto to being the first nonbinary vocaloid. i think the person who drew their boxart also drew oliver's, cause their styles look similar.
funny you mention them because aurum is actually who ausgris turned out to be! :) they are being reworked into a voice for vocatone's upcoming AI singing synthesizer, maghni AI. their name was changed from ausgris to aurum because a) aurum is easier to pronounce and b) the katakana spelling used for japanese audiences, オーグリー (ougurii) sounds/looks too much like the word "ugly" and vocatone didn't want anyone to make fun of them.
they also have a counterpart named audine! audine is described by natalia shmueli (owner of misbah studios, collaborating with vocatone) as "feminine, you can use she or they or whatever," but aurum remains explicitly agender and still uses they/them.
they are both expected to be trilingual in english, japanese in spanish, but i think the software might have options to let them sing in many different language.
this is the latest progress report released by vocatone if you're curious!
