Something about 'I almost got myself killed because I tried my very best not to harm/hurt her.' Or something along those lines
She was pretty formidable.You came here faster than I thought.You know, don't you? The fate which awaits a magical girl...her destiny...So you're the one behind all this strife.What is your purpose? Grief Seeds? What are you going to do once you've killed all the magical girls?I almost got myself killed because I tried my very best not to hurt her.I had to purify her quickly or she would have died, she was too contaminated, there was no time to lose.