Although Elidyr had received Andrew's message and immediately traveled to Cannes, he was unable to arrive before another group of people. In fact, before Andrew's message, Elidyr knew about the Cannes attack.
The reason he had not gone to support was the same as the dragons. Although Purgatory did not create a fence around the territory of the liquid spirits in the country of Rios, Elidyr was worried.
He believed that if he left, his brothers and sisters might suffer a sudden attack and although he is a great friend of Zaros', and wants to protect Andrew as a god candidate, he cannot detach himself from his family.
The liquid spirits, like the Amazons, barbarians, and angels, were suffering from a birth problem. They were no longer as many as in ancient times and although the situation is not as serious as that of the angels, they could not afford to have casualties.