He is an anonymous character and does not reveal his personality anywhere in the novel. He is average in appearance and unremarkable in abilities, but he possesses a strange capacity to produce uneasiness in those around him, keeping everyone sufficiently unsettled for him to exert his control over them.
Does this count as communication to Marlow? His immature appearance and mannerisms allow him to exhibit the glamour of youthfulness and the audacity of adventure. Where's a sailor that does not smoke?
Through a relative, he joins a company in Brussels to work in Congo, the heart of Africa. Just as important, though, was the fact that Conrad chose a genre of fiction——the novella——to convey his message, albeit in a decidedly unconventional fashion.
Marlow hears very surprising facts about him that he is half French and half English and a genius. The protagonist is Charlie Marlow, a steamer captain during the Scramble to Africa, tells his crew of his travels into the heart of Africa, up the Congo River to an ivory trading station, deep within the impenetrable forest of Congo.
He claims to have taken care of Kurtz on many occasions.
He is considered to be average and unremarkable, however, he has a strange ability to cause feelings of uneasiness in those around him.
Marlow's detachment from his experiences comes to the fore again, and perhaps even more fully, in his final confrontation with Kurtz.
Often, their actions are far more indicative of their true character than their speech.