Tar and Feathers
Imagine Jack Sparrow but with a lemon obsession
Jack Lemon was discovered by our adventurers the same way Leprosy Man was…In a cage. Jack was nice, he offered lemons to the party, he always has lemons. One of them blew up and allowed the two to escape. Apparently Lemons can explode, or at least Jacks can.
He looks like a cross between Johnny Depp and Jack Lemmon ( the actor, no coincidence ).