Even though Kobayashi maintains a cool demeanor, she has been regarded as kind-hearted and reliable among her friends and colleagues. Level-headed and pragmatic, she stands as the source of reason when dealing with her dragon friends. Kobayashi usually tends to show little emotion and acts very lazy when she gets to stay at home. However, when she is intoxicated, Kobayashi tends to become rowdy and aggressive, especially in her interests in maids, and is not above subjecting Tohru to her drunken whims.