Quote Originally Posted by Kraco
Kaname was always level-headed, though in a bit different manner compared to Tsumugu, so he behaved exactly like I expected.
I didn't say it in my post, but I did mean in comparison to Hikari.

And you're right that the Ena isn't a genetic difference. Supposedly you retain Ena if you were born in the sea, since the amniotic fluid surrounds you and remains on your skin or something instead of bursting and washing away on land.

When that was first mentioned, I wondered why people didn't have sea-births anyway just to maintain their 'citizenship'. Then I remembered that the villages cast you out anyway when you left, so there's not too much point. For the child, having a physical inability to go underwater may be less painful than knowing they're being shunned.