Kled..

Meanwhile, pondering the possibility that it's a BIlgewater yordle... Due to his flintlock pistol and his pirate accent in the video.

Have you been living under a rock? The amount of threads saying that Kled looks like Gnar and Rengars love child is too damn high https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcRJ4g5hN3zIlr6LyfXIXugU8ATFLzmr4a6GIMyFRmjp8O80-xFNN_9TR6U

nobody mentioned the karthus hat

Isnt Kled the name of the mount?

Throw Dragon Trainer in there and you've got something.