Furnius is the nephew of Flame King. His father was killed by the Flame King in order to take the throne. As a result of this, Furnius and his sister Torcho attempt to assassinate their uncle by pouring ice in his ear as he watches a play, but are foiled by Finn and Jake who overhear them discussing their target and decide to intervene. Furnius and Torcho disguise themselves as executors of the Flame King and are ordered by the Flame King to execute both Finn and Jake. They are stopped, however, after Finn identifies Torcho as the Flame King's suspected assassin by her untied shoelace. 

Furnius has a forked tongue. Thus, he speaks with a hiss inflection in his voice. Finn and Jake use this recognizable trait to track him down, since they had yet to see his appearance after hearing him talk about his plot to Torcho. This leads them to accidentally mistake Jalapeño pepper for him when a snake on Finn's shoulder hisses as Jalapeño pepper speaks. Eventually Furnius' hissing enables Finn to recognize him as the conspirator when he is disguised as an executioner. After Torcho and Furnius' plot is exposed, they are both put in a "punishment room." Their true fates remain unknown until Torcho is shown to be alive in Pirates of the Enchiridion. Thus, it can be assumed that Furnius survived as well.

Furnius only appears in the episode "Ignition Point."


Sssso long, ssssuckers!

—"Ignition Point"

Hello Uuuncle!

—"Ignition Point"

You cannot quench the flamessss of revenge!

—"Ignition Point"

I'll dessstroy all of you, with ice!

—"Ignition Point"


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