I have being through dawn.

Held steadfast against the rising tide.

Journeyed through the howling dark.

I saw the other side yet did not survive.

I think I know this one... but Imma let some other people guess first.

Jenkins?

Miranda Keyes?

Nada

Johnson?

Nope

Noble Six?

Tis Wrong

The leader of the squad of marines in Mona Lisa?

That ain't it

Forthencho?

Hotter or colder?

You were close with Miranda

Jacob Keyes?

Getting colder

... Truth?

That is a no from me!

I honestly have no idea, so I shall now guess various Naval Officers.

Haverson?

Hmm, your getting mighty cold now. Though naval officers is related so....

Lord Hood?