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To clarify even further on the term "hag", this being a weeb hobby, it comes from Japanese (and more broadly, Asian) culture surrounding the marriagable age of women. Women are expected to marrry before age 25, and if they remain unmarried past this age they are considered "Christmas cakes", this being a reference to the cakes in the lead-up to the Christmas holiday in Japan, which coincidentally is more like their version of Valentine's day. Cakes still on shelves past December 25th go on clearance. 30 or older and unmarried effectively makes you unmarriageable, and thus already an old woman or "hag". Of course, western standards have always been different, even as far back as the Medieval era, so the terms as adopted by weebs became ironic, and then terms of endearment used towards anime characters they liked, and now vtubers. So to sum up, if you are a femchuuba and get classified as a cake or a hag, it just means that your age is no obstacle to your fans' lust for you. That, and they enjoy teasing you.