"Afghan Girl", "Savanna magical girl", and "Tibetan magical girl" are all from the same sequence. They appear only briefly and have no canon names (also no voice actors, so there's no official reference to them in the credits). On Pixiv, the only one where multiple Japanese users have agreed on a tag is "チベットちゃん" ("Tibetan-chan"). There's a single picture tagged "サバンナからの女の子" ("Savannah girl" or "girl from savannah"), apparently no others which tag that character, and I couldn't find any at all with a tag naming the Afghan girl.
As the AO3 wrangler for the fandom, I would prefer their official tags to be standardized if possible. So here are the tags I would choose for those three (in the absence of a native speaker volunteering something more accurate...or the creators revealing their real names):
Meanwhile, "Cleopatra VII of Egypt" is easy, as she's the same character as the one on the existing tag. According to Wikipedia the ancient Greek would have been "Κλεοπάτρα Φιλοπάτωρ". "Queen Himiko" is also the same as the existing tag. Wikipedia gives her name as "卑弥呼".
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"Afghan Girl", "Savanna magical girl", and "Tibetan magical girl" are all from the same sequence. They appear only briefly and have no canon names (also no voice actors, so there's no official reference to them in the credits). On Pixiv, the only one where multiple Japanese users have agreed on a tag is "チベットちゃん" ("Tibetan-chan"). There's a single picture tagged "サバンナからの女の子" ("Savannah girl" or "girl from savannah"), apparently no others which tag that character, and I couldn't find any at all with a tag naming the Afghan girl.
As the AO3 wrangler for the fandom, I would prefer their official tags to be standardized if possible. So here are the tags I would choose for those three (in the absence of a native speaker volunteering something more accurate...or the creators revealing their real names):
Afghan-chan | アフガニスタン人ちゃん
Savannah-chan | サバンナちゃん
Tibetan-chan | チベットちゃん
Meanwhile, "Cleopatra VII of Egypt" is easy, as she's the same character as the one on the existing tag. According to Wikipedia the ancient Greek would have been "Κλεοπάτρα Φιλοπάτωρ". "Queen Himiko" is also the same as the existing tag. Wikipedia gives her name as "卑弥呼".