I) Her face hasn't been shown. They may have done something like take her other eye as a punishment. She can never look upon her lover's face again and is incapable of returning to the battlefield. This is the less likely idea.
https://mangaspoiler.net/kingdom/12986/
II) I am wondering if we are going to see Big Shiba follow up on his "talk to them" thing. Remember when he was talking to his veteran retainer about that? Maybe he is going to talk to Shiryou and Sou'ou in order to sway them to Seika. He succeeds, he acquires two new subordinates and effectively replaces his General losses in Jiaga and Joukaryou. He fails to convince them, execution time but at least Shiryou and Sou'ou die with each other.
I will say, if Shibashou actually tries to recruit Sou’Ou and Shiryuu to Seika, I will start to suspect that Ousen fucked his wife or something lol.
I mean not only did Shibashou kill his best commanders and destroy his whole army, now he tries to take Ousen’s final remaining commanders into Seika???? Lmfao
Though even that would drastically increase the chances of my Shibashou theory lol.