All his sadistic glee in claiming the hefty toll was replaced with real joy that Ed finally learned the ultimate lesson, that alchemy isn't everything.
While the Trickster may be mischievous, impudent and uppity, they is not necessarily openly malevolent or sociopathic in fact, in many cases Tricksters are more friendly to humanity than the gods are. The Trickster is NOT the same as the Jerkass. They often want nothing more than to show that they are smarter and more clever than the hero, who may also treat such a villain as an amusing diversion as they are often easy to defeat non-violently. In cases where The Trickster is an antagonist or villain, they are quite frequently a Harmless Villain and more of a nuisance than a threat.
Mythical versions may also be Hijacked By Satan, sometimes in direct contravention of their original legends. In modern literature, the Trickster survives as a character archetype, ranging from the self-aware and purposeful, through the merely impulsive and mischievous, to an openly hostile antagonist.