Sima is a Brachiosaurus colleague of Augustus Plinth's. She designs rooftops. Arthur Denison was introduced to Fleuron, Acanthus, and Sima by Augustus Plinth on the roof-top cafe called the Eye of the Volute, located in Sauropolis.
In the books[]
Dinotopia: Journey to Chandara[]
Source: Journey to Chandara, page 32.