I looked everywhere for a list where to find all characters on the maps and also which gift they need to increase their Bond, but couldn't find any.
So I'm making one myself now
I will add the Boar Hat Guests aswell so if someone sees one it would be nice if he sends me a screenshot of the gift they need and the time schedule board when they appear!
Boar Hat (always available)
Increase Bond for Meliodas by several actions in the Boar Hat
Boar Hat Guests
List will be updated all the time