nico is a merman or well. as others call it, a merhuman. he isn't the kind to turn into a merhuman from simply drinking water or getting slashed by water [especially a cup]. he only becomes one when he's fully in water like a lake/river/pong/pool/etc he's the captain of a ship and sometimes ends up jumping overboard to either get a crew member that fell or to get something that fell overboard. his crew knows what he is so they don't get bothered by it he usually keeps it hidden when near town folk because he knows they'd hunt him for his tail [as a merhuman] his tail is like a shark tail, a blue-grey shark tail in fact. he has scales on his body but not his face [I'll try it one day just not now] he's great friends with Veeren, pretty close actually. only Veeren [outside his crew] knows he's a merhuman since he trusts Vee a lot. he even taught Veeren how to fight with a sword even though Veeren usually uses a bat for protection he usually has his sword on his back [strap thing]