Yes I was basically thinking, that they probably know each other because they're clan heirs, and therefore will probably interact with some frequency when they take over. So their families were just sort of like here meet each other, though Hyuuga was like somewhere sunny and public with few spiders. Oh god if she met Mi-chan just sort of stuck a leg out like Hi I exist Hinata would probably hide behind the nearest relative. Especially if she was younger. Masa's what 12, 13 max? At the very earliest they could have met when he was 4/5 which would put Hinata at 7/8. So still prime age for arachnids to scare the shit out of her. She's less panicky about them around 12/13, but she does still typically squish them then. And if they're large she calls for one of her boys because scary.

Temari destroys giant scorpions so I don't think she's got an issue with spiders at all, plus Suna's fairly well known for its use of poisons so she's probably handled them in her 19 years, she just thinks it feels weird when they climb on her. And Karin generally doesn't care. She's fearless like that.