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Hans is the dolphin-like demi-human who serves as the radio operator and first officer of the city-ship Thames. He often disagrees with the Captain's decisions, especially when it comes to the use of firepower but he always follows through with his orders. After the Thames is sunk during the second disc by the -Seraphs- Hans moves to the grounded remains of Shevat with his wife Anna and son Lance. It's possible that he could be related to the Yggdrasil's dolphin-like demi-human radio operator Franz, but it seems rather unlikely.