“Super-engineered squirrels, or something,” the Lackya were minions of the Gilded Duke before the Baron squashed him. Like the Jägermonsters, the Lackya must have a master, and signed on with Wulfenbach. They do not get along with the Jägers.
The Lackya appear as fair-skinned (“Caucasian”) men with white or light grey/silver hair (with Sleipnir to them as "the footmen" and a Jäger general also calls them "feetsmen" once.), and color changing sclera in their eyes that shifts with their mood. Their typical uniform is a fuchsia coat with gold trim, a double-buttoned white waistcoat and black trousers.
They have been known to hiss when sufficiently aggravated. Since squirrels (whether super-engineered or otherwise) aren't known for hissing, this, along with their eyes, may indicate what "or something" might be.
While they look rather weak and have rather effete mannerisms - and are teased endlessly by the Jägers - one was seenthrough the head of a warrior wasp, and they do seem to be quite willing to throw themselves into a good scrap.