"The dead asking a dead man if he's all right?"

3 - She likes nugs and is very passionate and caring about them. Granted, she doesn't want to eat them like all dwarves do, but still, she's the only human (afaik) in the series who has shown so much interest for nugs. Also, following with the possibility of her mom being a dwarf, I wonder if she told her stories or had figurines or something about nugs and thats why she's so fond of them.

4 - She's in awe of Orzammar and really likes the city.

5 - The epilogue for lyrium ghost Leliana in Trespasser very much sounds like the song of the Titans, and the corrupted version of it which its what imo prompts the darkspawn to seek out the Archdemons.

Like this comment that Cole makes about the Titans’s song: “It’s singing. A they that’s an it that’s asleep, but still making music.”

Also, we all know lyrium is a titan’s blood. So a dwarven blooded Leliana becoming a “lyrium ghost” after “dying” could actually be pretty similar to what Valta becomes at the end of The Descent DLC. Also to note is that Valta somehow revived Renn after becoming connected to the Titan and acquiring its “magic”. This could also explain why Leliana returned to life after being killed in the Temple of Sacred Ashes", cause she would have a special connection to lyrium from her dwarven blood.

6 - She has super strong thighs that can break a person's neck. Clear sign of dwarven genes.

Venatori: "You will break!" Leliana: "I will die first! Or you will"