Finnick doesn't mind her being useless; that's the point, anyway. He cradles her carefully as he picks her up, as though she's something extremely precious.

Strong... She thinks he's strong. That makes him feel warm. He smiles to himself.

"You're allowed to sleep. In fact, you should. I'll keep watch and take you to bed when it's time."

He lowers her slowly into the warm water, then steps in behind her, grabbing a sponge and some soap on his way in. He lathers it and begins to gently clean her.