Legendary creatures in King of Pantheon had a high IQ and the Mermaid Princess, Freya was no exception. The fact that she replaced the Black Dragon Princess back in Soul Gate was proof she ranked higher than the Black Dragon Princess.
Fernando the Siren would distribute random quests daily and out of them all, the letter-sending quest provided the biggest reward. This was because the sole recipient of the letter entrusted to the players was his fiancée, the Mermaid Princess.
If Li Yi did not have the Mermaid Princess as his mount, he would have to find her somewhere in the vast water territory upon receipt of this quest.
The Mermaid Princess traveled at the speed of light and had guts the size of a pea. This beautiful seductive creature would not allow anyone close to her and would disappear out of sight after a brief glance.