Jägermonster

A Jägermonster, or member of the Jägerkin (but usually just Jäger), is a construct created by the older Heterodyne generations to serve in place of military personnel. Jägerkin have a broadly humanoid appearance, although in general they're rather ... odd ... looking and unlikely to be confused with real live humans. They are created by some Spark-ish process that hasn't been fully described yet, but apparently involves consumption of some infernal potion.

Jägerkin are feared by most people, for several reasons. For starters, they're fearsome hand-to-hand fighters (the name, after all, translates roughly as "hunter monster") who can both absorb and deal extraordinary amounts of damage. For another, they're usually associated with some of the truly infamous Heterodynes prior to Bill and Barry, most of them involving serious carnage. And of course, there's the entire Hyde-monster mystique, and their reputation for anthropophagy, which seems to be greatly exaggerated. They prefer bug.

They have a highly-developed sense of smell, which comes in handy in a great many settings; for example, they're able to sniff Agatha out as a Heterodyne, and much later, after  Gil zaps the clanks commanded by Rudolf Selnikov, they are able to smell that he's been hit in the battle, although Gil shows no obvious signs of damage.

Most Jägerkin are currently employed (and thereby protected) by Baron Wulfenbach for use as troops (though they make noises about the lack of consistent fun, ie. big fights). There are also (very few) wild Jäger, a subset of Jägerkin who volunteered to stay separate from the pack and search for their Masters everywhere in the world, so they could keep their promise of undying loyalty to the Heterodynes.

The four Wild Jägerkin encountered so far are Jenka (with her bear Füst), Dimo, Maxim, and Ognian, who had family imprisoned by the Sturmvorauses in Sturmhalten.

Schpellingk und Tings dat Talk Fonny
Jäger, Jägerkin, Jägermonsters, and Jägertroth have all been used to refer to these charmers at one point or another. Jäger, the German word for hunter, is both singular and plural and does not take an "s" on the end. Since this looks wrong in English, the "s" is often added anyway. Jaeger is also used when typing for speed or when ä (Alt-0228 or HTML &amp;auml;) is not available. But hu carez 'bout dot schtuff? Hiz not like der Jägerkin are all dot beeg on schpellingk anyvay.

Jägerkin in the story tend to speak with an exaggerated German-like accent, which seems reasonable enough considering German is the lingua Europa. Since they are the only characters who do, their speech may be heavily seasoned by an older Mechanicsburg or Eastern European dialect.