Hey bro, how's it going?
This idea of copying and pasting nodes is really good, and it's not that complicated to implement, since it only involves modifying the node editor. I'll implement it in the next few days, thank you very much for the suggestion.
You can add me on Discord if you want: https://discord.gg/p8Y3VEyYT
Add me a DM there, we can talk soon about your relationship plugin idea. It would be a pleasure to develop a tool along those lines; I don't have one for visual novels yet.
Thank you for the message and for all the support. Just let me know if you need anything!