Prat is the second developer of Melvor Idle. He comes up with ideas of weapon and new concepts, both Prat and Malcs (aka Mr Frux) balance and “number crunch” it, and Malcs codes it into a new update.
His profile picture in discord may mean that he likes penguins. His role is “Something Random”, at level 98. When asked what his profile picture was, he once replied “It’s a person riding a penguin into penguinland to more penguins...”
Maybe we shall know more about him as time goes on.