Authors:

I would say it was the directors. We have to give credit to the directors for this, because in the script, we just said, "Gru's Minions do this or do that" in the initial draft. And then, they came up with the characters' design and the philosophical concept of the Minions. And then, we started writing to that. We have to give a lot of credit to them.

Source: collider.com
I would say it was the directors. We have to give credit to the directors for this, because in the script, we just said, Gru's Minions do this or do that in the initial draft. And then, they came up with the characters'