I asked this a few months ago, but I wanted to see if I could get any new ideas. So that quote from Grima that goes "If I were human and able to live among you, then perhaps...", I don't understand it. Some have said that's Robin talking, while others note female Grima's toned-down quotes (she's not as hateful as male Grima), so maybe Grima likes the summoner and would like to live with him/her? I really don't know what they were trying to say with that quote, but I'd be very interested to hear your opinions
Suppossedly, during the third xenologue where you are able to fight Grima, they show some kind of... "humanity" left, especially when you defeat them, so the line could represent the fact that Robin still exists within Grima, especially their memories of better times, and that creates certain yearning within them to be human again.
YUp, in Awakening's og universe, it is shown that Robin's only close friend was seemingly Chrom and his/her potential spouse, who died. Assuming Robin was unable to act, he became a slave to Grima's will, save for the fact that he and Grima are one in the same. What that means is that in Awakening's true future (the one you save) you are a different Robin, as your friendships and your personality are separate from Grima's due to your lack of memories and attachements to your past. That also solidifies Grima as his own person, and gives him the want to be alive, to be human, to potentially be like humans. It's a cool topic overall.
Still, what Argent said applies too. Grima was kinda like Idunn, Binding Blade's final boss. They were forced to become evil dragons because of a human's actions, a contrast to other dragons like Duma, Medeus, and Loptyr, who became mad because of their refusal to become manaketes, and his refusal to bow to humans in the second's case.
That, and as a side note. Grima was created from a divine dragon, which was corrupted with thanatophages that made it a dragon of death, further forcing it's prior words of humanity making it as repulsive as it says it is. In a way, it has seen humanities ugliness at it's worst and blames humanity for its repulsive nature. This is also cemented by the fact that Grima and Robin are, in a way, a single being, save for the amnesiac Robin who was semi cut off from the cycle.
In short, that is Grima when it gains some form of knowledge over humanity. It sees that with a human body, it could potentially coexist, feeling some connection to humanity through the memories of friends, lovers and family that Robin has within his/her mind, further making it doubt it's current situation, wanting to be more than just death incarnate.
In all honesty, Valentia and Heroes added more depth to Grima, making it seem less like an agent of death itself and more like a victim of an old human necromancer going insane with a divine dragon. Not saying he's a good guy, but it makes you wonder if he had the memories Robin had now, would he have potentially turned human, and chosen to live with humans.
Pokemon GO
Fire Emblem Heroes
Fate Grand Order
Dragonball Legends
Dragalia Lost
IV Calc
Heroes