Update: It turns out that this group is made up of sparkhounds wearing Dr. Eg's Nerve-Enhancing Armor. We must assume then that this Tybalt is another alpha sparkhound like Zogok.
This is but one of an army of loyal armoured soldiers who greeted Tweedle as the Storm King as he disembarked his airship. They all wear white armour and salute with their sword tips pointed at the ground. They also ride very peculiar horses for which we do not yet have a name. There is a very strong temptation to refer to these constructs has "half-tracks" but it is being resisisted with steady resolve.