Inktober 2017 Day4: Underwater (Edlin/Eathlyn)

Today is #Day4 of #Inktober
As stated yesterday, today's theme is Underwater and I'm obviously going to be drawing Edlin again.
Where are Kai and Cassio? We'll see what the rest of the #Inktober2017 prompt list has for us.

Inktober so far has turned into "Draw Edlin's backstory in three colors or less" 
I mean, with prompts like "Underwater" "Sword" "Deep" and "Ship",what else am I supposed to draw?