See here, there is an interesting story about that monument, it's in French but you can google translate if you don't read French (monument 12 dedicated go Edward VII): https://www.google.ca/amp/s/mesquartiers.wordpress.com/2016/01/21/top-20-des-plus-belles-statues-a-montreal/amp/
The angel figure seems to represent the ingeniosity of Liberty, which looks at the chains it has jist broken: persecution and religious prejudices. This seems to be a reference to Edward VII, as his first decision, as newly crowned King of England, was to remove the part in the sermon about kings having to persecute Catholic religion followers.
Wow thank you for such a detailed story!