>>102590820 (OP)I'd hazard to guess the endurance streamers and the always tired as fuck workaholics are probably safe. So the likes of Mori and Koyori.
Those with an idol past are either so broken they can't form relationships or they already have a husband.
Well put together, punctual types are most likely in a stable relationship. If your chuuba has an unstable, degen sleep schedule, chances are she's single.
If your chuuba has a pet and is obsessed with it, always talking about it on streams etc. chances are she's single. But this doesn't always work: cf. Nimi.
Kronii is obviously single. She's walking failure incarnate.
Re: Biboo. She certainly had bfs before Holo but probably ended her relationship soon after getting in. 100% after moving to Japan and keeping the output. Successful people don't resort to LDRs.