Yannik Reyar was a male Cardassian who lived in the 24th century. Reyar, the father of Kalisi Reyar, worked as the liaison between the Cardassian Central Command and the Obsidian Order.
In 2348, Reyar was contacted by his daughter Kalisi, who told him about her friend Miras Vara's encounter with a Bajoran orb. Reyar agreed to provide the Obsidian Order with the information Kalisi provided him with. (ST - Terok Nor novel: Night of the Wolves)
After Kalisi was murdered by Dost Abor in 2365, Kutel Esad informed Reyar in 2368 that Abor was now living in the Coranum Sector of Cardassia City under the name of Ran Lotor. (ST - Terok Nor novel: Dawn of the Eagles)