@Draco Dei
No, the tank is the vehicle that Katyusha (the braided earth pony), is sitting in. The cyborg pegasus is Scarlet Shrike. The third character, Cornflake, is the one I suspect you missed. His head is poking up behind Katyusha atop the turret.
Is one of the three listed characters the tank? Clicking on the names did not reveal further pictures of tanks, yet I only see two characters (and some indistinct corpses).
Ah! I see him now!
No, the tank is the vehicle that Katyusha (the braided earth pony), is sitting in. The cyborg pegasus is Scarlet Shrike. The third character, Cornflake, is the one I suspect you missed. His head is poking up behind Katyusha atop the turret.