Nathaniel Howe/Approval

Vigil's Keep Throne Room
Begins with, "You know, I'm actually not the first Howe to be a Grey Warden."
 * A distant relative, I presume?
 * Seems like your father didn't remember that.
 * Carrying on the family tradition, then?
 * And the Howes were never told?
 * Many good men and women die in the Joining.
 * So he wasn't actually a Grey Warden?
 * There wasn't a Blight back then.
 * His duty was to stay with his family.
 * The only shame was your father's.

Begins with, "I owe you an apology."
 * Just the one?
 * Any specific reason in mind?
 * No need, it's fine.
 * Yes, you should have.
 * I'm sure your father had his good side.
 * How could you have known?
 * No, I'd like to be friends.
 * I'm your commander, nothing more.

Vigil's Keep
After meeting Samuel
 * That's wonderful news!
 * Why did you think she was dead?
 * And? why should that interest me?
 * Good for her.
 * We could take a look, yes.
 * I think we have better things to do

Portrait of a Howe

 * Let me guess--your mother?
 * Is this something you came to steal?
 * What's so funny about that?
 * Why did he hate your mother?
 * Then what's the painting doing up there?
 * Do you have any fond memories of your family?

Amaranthine
After meeting Nathaniel's sister Delilah, during his personal quest The Howe Family
 * He murdered my family to get what he wanted. (available to human noble Warden, approval confirmed)
 * I didn't know him, but he tried to ruin the order. (available to Orlesian Warden, approval needs confirm)
 * He did deserve to die. He was an evil man. (available to Wardens uploaded from Origins that are not of the human noble origin)
 * You don't believe her?
 * Get over it.
 * It's not your fault, Nathaniel.
 * Maybe he was never who you thought he was.
 * He saw an opportunity and went after it.
 * If he'd been successful, he'd be a hero now.

Statue outside the Chantry
 * What does?
 * Those statues are everywhere.
 * Don't like it?
 * That's a shame.
 * I'll get them to replace it.
 * Your father was a traitor.
 * You can't seriously be surprised.
 * Your father was more involved than that. (Before meeting Nathaniel's sister Delilah)
 * It's up to you to turn that around.
 * Don't be an such idiot. (Before meeting Nathaniel's sister Delilah)
 * He certainly did. (After meeting Nathaniel's sister Delilah)
 * I don't know if it's all his fault. (After meeting Nathaniel's sister Delilah)

The Blackmarsh
Tree near Blackmarsh entrance
 * What evil magic could have caused this? / (If triggered after completion of the Blackmarsh) Well, it’s not a mystery now.
 * Your father told you stories?
 * Did he tell you anything else about this place?
 * You're doing that now, aren't you?
 * If the Veil is thin here, there's no repairing it.
 * Every little boy has such dreams. / (If triggered after completion of the Blackmarsh, OR if the Warden is female) You wanted to be a hero? That’s cute.
 * Stick around. This happens all the time.
 * It's also very dangerous.
 * It is, isn't it?

Given the Howe Bow

 * 1) This is the grandfather who was a Grey Warden?
 * 2) It appears to be broken.
 * 3) Well, it's yours now.