Reg is one of the animals in the Noah's island who live on the island. He is a big-headed, arrogant mandrill whose lifelong ambition is to become closer to his human relatives.

Reg will often be seen trying to read a book or walking on two legs in order to 'be more human.' He is good friends with Rocco but generally remains by himself in a secluded part of the island with his two "doggies" which are actually hyenas!