Ena is what the first original humans had to live under the sea. It's compared to as being like fish scales. Ena out of the water is like normal skin except it will glitter and shimmer lightly in the sun. Those with Ena are extremely sensitive to UV light/sun rays when out of water. If they're out of water for a long period of time, they can faint and the Ena will slowly chip away like glass. Some can gain Ena, such as Tsumugu and Miuna but seemingly only if they have people of the sea in their family lineage.
During Hibernation[]
Since the sea god's power was decreasing, the people of the sea had to get ready for hibernation, in order for him to gain his powers back. The people from the sea had to eat to their heart's content until they weren't able to eat anymore, in a final feast. They then had to fast and not eat at all, to cause their Ena to thicken. Their ena kept getting thicker, which meant that their Ena gets much drier than before. With the thick Ena, they were able to hibernate. But only if they were in the sea since Chisaki stayed on the surface after the Ofunehiki and did not hibernate.
Trivia[]
- A mixed blood who awakens their Ena will eventually need to rehydrate regularly as regular people of the sea; as Miuna needed to visit the pond at her school after her Ena developed enough.
- There chances of Ena awakening in mixed blood descendant may increase if both partners have people of the sea in their blood; which is possibly the future for Chiskai and Tsumugu's children. Since Tsumugu is 1/4 and Chisaki is full-blooded, their children would only be roughly 1/4 people of the land.
- Due to the sensitivity of Ena, those who have it do not travel far from available sources of water. Miori was noted to keep a bowl of water next to where she slept in order to replenish upon awakening.
- A benefit of Ena is that it keeps clothes from getting stained; since it absorbs any liquid. This humorously means one could sit in a bathtub fully dressed and gradually absorb the water into their ena.