Look at this:
"Shepard/Aya/Shadow/Trigger/Wesker "
Shepard, Shadow, and Wesker CANNOT hit Cielo. It is absolutely, 100% impossible for them to harm Cielo, and by extension Athos, as they are simply too slow. This isn't wild guessing, I have played DDS games and the games those characters came from and I know without a shadow of a doubt that those three are incapable of harming Cielo. For all intents and purposes, Cielo and Athos are invincible to those three. You say PH will take I while to get to them? I say who the hell cares, they basically cannot harm half of my team.
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You beat yourself up with your past. Don't blame yourself, blame the world. Blame God. Blame me.