He’s a turtle.
Dindi is a turtle that likes to wander. He loves to see new sights and sounds. While young he wandered all the way into the mountains and into a dwarven mine. That is where Dindi met Dimli. They quickly made a connection. Dindi is fiercely loyal to Dindi. He also becomes loyal to Dimli’s friends. Dindi still wanders though only when he thinks Dimli will follow. Wandering together, Dimli and Dindi have seen nearly every corner of the forest and many sites around the forest.