The second scroll in the game has a picture of the final battle of Splatoon's Hero Mode, where you see DJ Octavio and Agent 3 fighting it out. You can clearly see Agent 3 with long hair, so that playable character is a she. :>

Also, a younger Marina can be seen in the audience, so you know the reason why she wanted to become a DJ.
I wish the story mode would tell us how marina came out and live in the surface or why some octolings are good guys.
 
	 
				 
	 
	 
	 
 
		 Ended with 7 kills (I really sucked until the last minute) and with the help of another teammate who got 12 kills we managed to turn around the match even though the other 2 guys in our team played very poorly. Still, Moray Towers is no longer an easy map for chargers, you can't reach the other side and enemies have now a lot of options to assault you. Good changes, makes camping a useless strategy.
 Ended with 7 kills (I really sucked until the last minute) and with the help of another teammate who got 12 kills we managed to turn around the match even though the other 2 guys in our team played very poorly. Still, Moray Towers is no longer an easy map for chargers, you can't reach the other side and enemies have now a lot of options to assault you. Good changes, makes camping a useless strategy. 
 
		