Unnamed gelatinous warlord the achievement text names as an investment banker whose death would cause real chaos.
Listed in the Gavrilo Princip! achievement text among the targets that would cause genuine galactic chaos rather than mere litigation: "Try killing that Dream guy. Or the Viceroy. Or that Jello-looking thing." The text concedes he may not look like much, but insists things get interesting when you start killing off investment bankers.
The implication is that his backers are financial rather than political, so his death would ripple through markets instead of probate courts the way Empress D'Nadia's does. Carl's sponsor plants the suggestion and then disclaims any wish to be a backseat warlord.
Gelatinous and unimposing — the achievement text notes he may not look like much.
A warlord-tier financial power flagged to Carl as a high-chaos assassination target.