Spoiler
So basically Isiru (or Iseur) is a mermaid who was curious abt human culture js like his older sister. After meeting Giovanni, he wanted to become a priest of the sun god, and he dreamt of humans and mermaids being at peace w eachother. But one day after the villagers discovered Giovanni had made a bond and had sheltered a mermaid they hunted them down and trapped Isiru and his sister in a fishbowl and let them starve nearly to death before throwing Giovanni inside the fish tank. They didn't realize who he was until they had alr eaten him to death (btw mermaid don't eat humans by nature it IS a superstition, but they were so starved they didn't even realize their actions). Giovanni does not resent them at all btw and Isiru has come to hate humans, the bad ones and the good ones (altruistic) for "impersonating" his teacher Giovanni.
Will Iser meet Giovanni later? What will happen?
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I mean, based on other spoilers I get that the mermaid siblings loves him, but current Iser saw Jio as someone who worships Sun God, right? So I'd like to know if Iser and his sister will know that Giovanni will be in the same body (?) as Jio.