I'm on my second playthrough of Awakening where Robin is Yarne's dad and this just occurred to me since what Yarne worries about in his supports with his father is the father cheating on Panne...which is somehow bad for Yarne's existence.
So...yeah.
Disclaimer: Don't own Fire Emblem Awakening. All I own is this little story.
Not Enough Foresight
By Bilbo-sama
For most of his life, Yarne's concerns were about staying alive in order to keep the Taguel race from going extinct and making sure his little sister, Morgan, was safe from harm.
But now that they are in the past, his existing worries and anxieties started to include new ones. Like, boats for example. Its bad enough that they could sink into the ocean but it turns out they can also be set on fire too (thanks, dad, for that revelation). Or what if Morgan gets eaten by Minerva because Gerome got tired of her bothering him all the time? Or what if Robin decided he wanted a human wife instead of Panne?
That particular concern took hold and the small (and not as consuming as Morgan's) Tactician side of him went to work on making sure their father stayed true to their mother. If he left, then as a result Yarne and Morgan would never exist because Panne would refuse to choose another human as her mate for the rest of her life and the Taguel race would die with her. And if that happened, then Nah would be all alone...
But as Robin landed the killing blow on Grima's human host, despite pleas from everyone, it suddenly occurred to Yarne that he never had a plan on what to do if Robin dies before Panne conceives.
Shit.
Shit shit shit.
Now what is he going to do? His ears twitched, defeated, as Morgan clung to him (and not Gerome and his stupid mask, Yarne dimly noted) and sobbed.