[I tried...and it was confusing. I liked the fights...but I didn't really understand how it all finished. halp?]
It makes perfect sense. Go watch it again. (unless if you're talking about the ova, because in that case no one understands the ending)
I mean I got it...I did watch them all... I just got lost after the first few episodes. Was Black Rock Shooter bad? who was Strength? .-.
I don't think she was "bad", but she was definitely more brutal in the anime. Spoiler: about STR STR was Yuu's otherself. Except Mato was actually friends with STR, because they had already switched places because Yuu didn't want STR to endure all the pain herself. Which is why Mato was confused when she heard Yuu was actually the otherself.