User blog comment:Kogath/Monster Hunter Frontier G6 Discussion/@comment-6050823-20141217230348

Well, this guy came out of nowhere for me so I wasn't ready to gather any info on it today but I did learn some things about it while looking around the internet.
 * Duremudira is The Guard of the Sky Corridor.
 * It seems the ancients either trained this guy to protect the Sky Corridor or just captured it and put it in a locked up room in this tower.