[Robin's not sure there's anything suitable to respond to that with. In the end, he just adjusts his cloak around her, trying to swaddle her up even more so she'll be warm and toasty and not liable to fall out of the pocket.]

...I'm a pretty mediocre Servant, so I can't make any promises, but I'll do whatever I can to keep that from happening to you.

[It's a poor reply, but Robin can barely deal with his own baggage. He has no idea how to handle other people's, especially without coming across as insensitive.]