I'll go with the theory that somehow robin and this tactician are ancestors or somehow related XD
Lucina by Kimkun06 on DeviantArt
“You're right. I can't stand these Nohrian scum. If they've done ANYTHING to harm our master... I don't know what I'll do.” —Oboro, Birthright Chapter 9: Land of Gods Oboro (オボロ) is a playable character in Fire Emblem Fates on the Birthright and Revelation routes. One of Takumi's personal retainers, Oboro is a Hoshidan Spear Fighter who bears an unquenchable thirst for vengeance against Nohr for the death of her parents.