Well well, if it isnt a crossover between Dynasty Warriors X MLP FiM itself. I always wanted to imagine a battle like this. (Though Im not much of a map maker and stuffs. )
 
So what would the plot be for this one? For me, lets just say Twilight has doubts on Cao Pi since hes trusted by Princess Celestia on the destiny to unify the mixed land of the Three Kingdoms (AKA China ) and parts of Equestria. Sima Zhao leads his own faction and although an enemy of Cao Pi, he wishes Twilight to trust Cao Pi regardless how he does. Therefore, he decides to attack. But when he sieges at Fan Castle, Cao Pi surrounded the castle with his troops. Then, Twilight uses this opportunity to defect to Sima Zhao and tries to route his army even with Rarity in it, apologizing to her about her doubts.
 
So about the “officers”, Trixie would be a stratergist for Cao Pi since shes like a rival match to Twilight obviously. Rarity would just be an ordinary unique officer, but she could stop Spike from advancing. (LOVE IS BEAUTY ) Other than that, she could have a special conversation with Cao Pi.
 
And no, if I were to be in charge of a DW x MLP FiM game, the only ones that will have their life taken away, if you know what I mean, are the humans/warriors only. )
 
Cao Pi and Sima Zhao sprites along with the map are made by me (Yukimazan)