I get finding the aesthetic appealing since it's a bit toned down and probably not as 'stuffy' as lolita dresses (seems impossible to wear during the summer but i'm in the south) but idk if ppl who self identify as 'menhera' would just also match it the same way 'bright mushrooms/plants are poisonous' but it would be an interesting horror/comedy twist where wearing that specific style made you mentally unstable
As you say, it's quite an appealing aesthetic. But that's part of why I believe the jirai-kei landmine girl stereotype works the way it does: people who could be considered menhera (not necessarily limited to just those who self-identify) wouldn't want to drive people away from them, since they're stereotypically supposed to be needy and clingy, but mentally unstable types (like that girl from Needy Streamer Overload).
So it makes sense that they'd gravitate to this style more than others, since it's supposed to mask the red flags by projecting an image of cute and sweet, girly innocence with just a hint of dark undertones. At least more than say, gothic punk, which just screams "Do I look friendly to you? Go away." with it's overly dark and unwelcoming aesthetic. So it's less a case of: "Stay away, I'm unfriendly and toxic." like poisonous plants but more like "Come closer, I'm sweet and I don't bite."
I mean, they wouldn't be called landmine girls in the first place if everyone immediately knew they were trouble. People who get blown up by landmines do so, because they didn't know the landmine was there and stepped where they shouldn't have... Or at least that was how it was at first, until the stereotype formed around the fashion, and now the style is (unfairly) treated like a red flag in itself with how the guy and his coworker treats the girl here.