I'm actually thinking about a backstory that links both characters for Symbaroum.
In this universe, where elves, trolls, dwarves and goblins exist, it is common for humans to be racist towards other races. Goblins are seen as unstable and simplistic creatures; of course, not all of them are like that.
As for my characters, the human is a master blacksmith who owns the forge but lacks any social skills. He likes to hoard knowledge, and even if he has the look of a warrior, he is actually a mage-type character. Meanwhile, the goblin is a tactician who has incredible social skills, can rally his allies towards a common goal, and he is also a good liar.
So my question is, what is the relationship between the goblin and the blacksmith in order to make them collaborate and open a forge together?