Poli's a member of the Ark police force and captain of the A.C.P.U. Squad. Her appearance and her temperament are like that of a little puppy. Though she can be rather careless sometimes, she's a real professional at work and always does a perfect job. Poli doesn't physically have any animal ears or tail. The A.C.P.U. (Ark Central Police Unit), act for the Central Government and keep Ark citizens safe from various threats. Even so, the public is not aware that they are Nikkes.