Replace with non-standard font

Not sure if I didn’t search well enough but i couldn’t find anything related directly to my question. I want to replace all # in all of my documents with an embellish character from a font that i downloaded and works on the MAC. I can change to the font and type the character or I can just paste it in. But when I got to command+v the character in ‘replace’ or in the compile area, all it pastes is the ‘standard’ character that it is. In this instance, I pastes 7 instead of the embellish. Is this something that can be done in some way? Or is this a manual thing that has to be done?