What is in this image? Describe it as if you were explaining it to someone from the 15th century.

The image depicts a fanciful creature, akin to a fantastical melding of familiar beings yet quite different from any natural form you might recognize. Picture a large, rounded entity, similar in girth to a very plump hen or perhaps a particularly bloated toad. Its visage bears a jolly countenance, with two large, gleaming eyes and a broad smile suggesting amiability.Atop its head sits a small, brimless hat, akin to what a tradesman or artisan might wear—a simple cap. Around its neck, the creature sports a dainty bow, much like the bows that might adorn the shoes or garments of nobility or affluent townsfolk. Its body concludes in what resembles the legs and feet of a frog—webbed and suited for hopping.Moreover, this creature is depicted in a manner that is deliberately simplistic and unembellished, possibly intended for amusement or the instruction of young ones, akin to the marginalia one might find in illuminated manuscripts, albeit far more whimsical and devoid of religious context.