>>101789402 (OP)
They're all probably vtubers already.
But otherwise, remember, in this context, they're all probably lying.
It's all about reading between the lines.
Reiko Kujou: Overwieght and unattractive, doesn't say anything at all about herself. Probably has low self-esteem. Rich family, unmarried, likely unemployed. Professional freeloader? Possibly has limited social contact and may prefer solo hobbies. Uncertain social and presentation skills. Reasonable potential for vtubing, but may have problems keeping up a consistent workload.
Mizuho Serizawa: Young, says she's interested in games and manga, but she's notably trendy and has a job. Likely a casual. Interested in a small business, which shows ambition, but she's already making conflicting life choices. Unserious. Prone to poor planning. Likely potential for Twitch streamer, but only short term. But if she gets a taste for it, her potential could quickly increase.
Marin Andou: Young single mother. Obvious gold digger. As a vtuber, she'd be caught in a scandal within a year. No potential.
Satsuki Hayakawa: Went to law school, but doesn't have a legal career. Expresses "high class" interests. Wealthy or connected family. Still single at 31. Divorced? Or prone to conflict and avoiding commitment? Possibly some potential as a pro-vtuber, but would only be in it for the money, and wouldn't stick around long if she didn't get it.
So I'll have to go with Reiko, unless further investigation suggests incompatibility. Her model or lore could be anything, really. She probably wouldn't speak up, and would be eager to please.