I think this is her boyfriend. https://x.com/K_Pring654
They are usually at the same event.
They used to have photos on Twitter showing they traveled together but all deleted now.
You can still find their "banter" on twitter.
They are either in a relationship or just very close friend.
Btw would like to ask if anyone knows where did Biya posted all these photos?
Didnt' see it on patreon or fanbox as well as twitter.. Just being curious if there are more ways to get her photos, thanks
Source: from the threads of Biya