> Actually, thank you for independently confirming that there's > no easy way to access the ZD code points using hex.
I think the simplest way to access the characters using unicode would be to edit /usr/share/groff/current/font/devps/ZD (or wherever your font description files are located) and give all those unnamed characters groff names: u2701 974,621 3 33 a1 u2702 961,611 3 34 a2 u2703 974,621 3 35 a202 (etc.) then you can just say Hello \[u2701]\[u2702]\[u2703] world. in your document without loading any macro file.
