For Beni the poll would be a landslide victory for bikini probably. Clear bikini win for Hinano... Would it be balanced for Ema? The more I think about it the more I see where he's coming from.
i think because of her pure and pristine vibe. like a quiet library girl or kind student council president, school swimsuit would just fit her. but because of her good body proportion bikini would look good on her too.
How about Met? I think she would suit the bikini with thin layers (that seems like curtains) or even sporty surfer bikini uwu But the first priority is still watching her embarrassed i'd say