So Hauser is a humpback whale who actually proposed to her directly 
Also he is
Also he is
Spoiler!
One of the husband’s of Calypso, he will appear near the end of the story.When Calypso talked to him, he readily admitted that he have memories of their past lives from the very beginning. The reason why he didn't met up with her was because he was afraid that she might not remember. He uses the time to spy on the imperial family. He was also the one who retrieve Linus which is the treasure needed to awaken Calypso's water power. He is the one who will inform Calypso that the imperial prince also have memories of the third timeline. However, his actions are restricted so he cannot leave the imperial city.
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I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule you will find me in most romantic historical manhwa comment sections
