No reliable direct information exists to produce a comprehensive character description for a character named Corne from the anime BEASTARS. Search results confirm a character named Cornu, a rat who serves as an intelligence agent supporting the Beastar named Yahya, appears in the final season of the anime. However, details regarding background, personality, motivations, role in the story beyond this basic affiliation, key relationships, development throughout the series, and notable abilities are not available in the provided information.