Can someone on Facebook, who blocked me, see my message response if I replied back to them?

[Theresa]

Someone I use to be friends with on Facebook has blocked me a long time ago. Here's the thing. When I go into my Archive folder, I can still see the message conversation between me & the friend. Even so, sometimes it shows a green dot next to the friends' name like they're online, or sometimes a phone symbol like they're on their phone, so that makes me think that there's a possibility that the person could still be on Fbk somewhere. My question is, if I reply back to the message, is it a possibility, that the friend that blocked me, maybe could see my response?