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Those are really rare(/TДT)/ . Though Im reading one but it's a guy reincarnated as a girl. http://www.mangago.zone/read-manga/eiyu_oh_bu_wo_kiwameru_tame_tensei_su_soshite_sekai_saikyou_no_minarai_kisi/
Another one is an isekai (again) but this it's acc a girl but obsessed with guns and stuff.
http://www.mangago.zone/read-manga/the_villainess_will_crush_her_destruction_end_through_modern_firepower/hs/hs_v-1-chapter-1/
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Hi, I have suggestions but they are not stereotypical battle op, they all have their own vibe I would say
http://www.mangago.zone/read-manga/kakei_no_alice/ —> survival ; the heroine has a badass Alice persona with murderer tendency and she has to kill her twisted family members to survive. It has the cute aesthetic of Alice in Wonderland too. (Don’t mind the “shojo” tag there are a bit of romance that comes later but that’s not the focus)
The next two recs are on my reading list so I didn’t start them yet:
http://www.mangago.zone/read-manga/claymore/ (anime too) : literally all the main cast is female (and they are badass warriors). If I’m not mistaken it’s a bit more dark than the average shonen. But it’s op battle from what I have seen
So I wanted to recommend “Youjo Senki” (anime also) too but nevermind it’s a man reincarnated as a girl *sigh* x’D The character is a badass soldier with yandere face expressions.
You can find a bit more by googling “mc female characters shonen”
I basically want a every stereotypical op shounen anime but instead of a guy a girl want some women power (︶︿︶)=凸 (=・ω・=)