Kobito-san

With the exact same height, face and voice, the seven of them line up next to one another. Treated like the forest's mascots, all seven of them are loved by the citizens. Out of everybody in the forest, they get on with Kitsune-san the most, because he gives them sweets everyday. They also seem to have some knowledge about many things concerning the mysteries of the Lost Forest.

Spoiler

The seven dwarves are actually Nazo no Seinen/Otona-san split up. Nazo no Seinen prefers to stay in his dwarven form(s) as he finds it more convenient, as well as the fact that he enjoys the attention, gifts and overall treatement he receives from the citizens of the forest.