No; one objective of Small Claims is to make it possible for individuals to argue their own cases without the added expense, since procedures are not as strict as those in regular court. You may use an attorney if you want, but one is not required. A corporation should be represented by an attorney.
While the statute allows for an officer of the corporation, or a salaried employee to present its claim or defense, they may not engage in cross-examination, argument or other acts of advocacy. Any act of advocacy by a non-attorney constitutes the unauthorized practice of law. The practice of law includes the preparation of pleadings and other papers incident to actions and the management of such actions and proceedings on behalf of clients before judges and courts. (Refer to section 1925.17 of Ohio Revised Code.)