Again, pretty sure Bisco is Euro. Might have been something she said in a stream, or some other piece of information that imprinted on my mind, but at some point I made the connection, "Ah, so she's from Europe then."
E: Definitely not from SEA, that's for sure:
A
E2: In any case, I think we might have a bigger issue at hand, if Gigi really is her:
A
E3: Ok, so she's probably US PDT, not Euro, judging by this Tweet (She was at Anime Expo 2023):
A
Still wondering about her mystery accent though.