[With her gaze down, she clenches her eyes tight, droplets falling to hit the pavement. It hurts to hear that pained voice, but she can't just let that pain accumulate over time. It's easier now to get it over with. Easier now for Madoka to realize who she's become.
Her voice strains to say what she does.] No... Y-You don't know what I've done. The sins I've committed. To you, to everyone. You don't want to know. And I'm not done.
[And there's more. If it could be any other Madoka here, and not the one who begged her, the one who saved her life when she should have lived instead just to entrust her with that wish--
It's all she can do to fake the coldest tone she possibly can muster.] I've failed you, Madoka Kaname. If you must remember me, never forget that.
I'll protect you, but.... [she has to pause to steady her words.] forget the friend you knew.
[With that she puts one foot ahead of another, trying moving away from Madoka, slowly, choking back tears. How much she wants to run off and how much she wants to stay. It's all she can do to balance the two.
She can't go too far, not when she needs to protect the girl, who undoubtedly is as powerless as she was her first day. But she can't bear to have those pink eyes on her.]