Beast Spirit of Water
The Beast Spirit of Water (水のビーストスピリット Mizu no Biisuto Supiritto) was created from Ancient Mermaimon of the Warrior Ten. It was found by Ranamon in the ruins of a ship. She eagerly acquired it allowing her to slide evolve into Calmaramon. When she is beaten by the Legendary Chosen Orimoto Izumi, this spirit was trapped in her D-Scan. It is later transferred to Minamoto Kouji's D-Scan when they are getting ready to preform hyper spirit evolution.
(Note: Is called Spirit of Water B in the TCG.)