Are آپ talking about a دکھائیں یا just a girl? I thought آپ were talking about a دکھائیں but everyone else has been posting characters so I'm confused. But I'll go with Rin from Mnemosyne and I'll also go with that دکھائیں to answer either question.
for girl butt-kicking anime, I'd go with Black Lagoon یا Kara no Kyoukai. For magic girl anime, I'd go with Puella Magi Madoka Magika یا Tokyo Mew Mew. But I think my all around پسندیدہ is Black Rock Shooter :)