Porthos picks up the pace when he sees the figures, the growl in his throat a low, dangerous warning that he's about to tear someone's head off for daring to lay a finger on Aramis. He shoots Athos a look that says he's going after them, knowing Athos will understand. He opts for his pistols instead, charging after them while loading up the silver bullets, knowing that if Athos can get a hold of one of them, Porthos can take down the one holding Aramis and then they'll be left with just the one.

He just needs to get close enough for a clean shot.