- Professor Otto Lidenbrock: a man of science and astonishing impatience and the uncle to Axel.
- Axel: the nephew of Professor Lidenbrock, overly cautious and unadventurous student.
- Hans Bjelke: a Danish-speaking Icelander eiderdown hunter who becomes their guide; dependable, resourceful and imperturbable.
- Grauben: the goddaughter of Professor Lidenbrock.
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