Cromach, ready to inspect the fresh batch of Order of the Silver Sun recruits. He only looks mean for the first few seconds, then he starts laughing at his own attempt at being serious. However, if there ever was an embodiment of tenacity, it’s him. After being blasted with Nightmare’s power as he jumped between the god and his lover, part of the divine power stayed in him and answered his tenacity by stopping his aging.  
Unfortunately, two hundred and fifty years later, the Corruption era was unkind to him the most, having lost his lover, the alicorn of Hope, multiple times to both the gods and finally imprisonment in the Silent Circle of Tartarus. Swearing revenge on Twilight and Celestia for doing so, he disappeared who knows where.