Wikia

Captain of the Thames — a demi-human similar to Franz from the Yggdrasil. He looks like a humanoid walrus in a naval uniform and frequently smokes a large pipe. He is known for his "Men of the Sea" code that he lives by, which is somewhat similar to bushido. When Deus' awakening caused the Thames to sink, the Captain supposedly went down with the ship. However, he soon reappears in the ruins of Shevat.
Hans — 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.
Franz — a dolphin-like demi-human who serves at the Yggdrasil's radio, radar and sonar operator. He is capable of determining the nature of all sorts of complex and abstract noises. He resembles Hans, the First Officer of the Thames.

Thames Crew