Write a short character sketch of Captain Nemo as he has been revealed to this point in the novel?

Captain Nemo, a man shrouded in mystery, is a fascinating enigma. He is an incredibly intelligent and knowledgeable individual, a master of science and technology, evidenced by his creation of the Nautilus, a marvel of engineering. His passion for the sea is undeniable, a reverence bordering on obsession. Yet, his demeanor is a study in contradictions. He displays a chilling aloofness, a distance that seems to stem from a deep, personal sorrow. His anger flares at the mention of land, suggesting a traumatic past. While he is capable of immense kindness and compassion, his fierce independence and fierce hatred for humanity's exploitation of the ocean hint at a vengeful heart. Is he a hero, a madman, or a tragic figure? The answer, like Nemo himself, remains elusive, wrapped in the depths of his own tumultuous spirit.