yukkronii (ouro kronii)
Ouro Kronii's alternate form which first appeared in the 2021 Hololive English Halloween VRchat collab. Appears as a disembodied head with a mechanical halo which doubles as a helicopter propeller.
Her appearance is a reference to the meme yukkuri shiteitte ne.
See also
This tag implicates ouro_kronii (learn more).