Charlie was all the way in the forges so he couldn't hear alex sense he went back to the mess hall, where the others are.

Mr. D looks to Gwen "because my dear Gekky, even if I try to ignore you half-bloods you still seem to find ways to get on my nerves..." he looks to Hector "especially when this kid is trying to use the mist to make me forget what I said his punishment was..." he kneels down "...listen closely Tacker You can't make a god like me simply forget anything, I'm afraid it's not possible, you don't even have the level of mist control to trick what i'm seeing..." he shakes his head "...if I was in a more agitated mood, I wouldn't even be saying anything right now, so be 'happy' that i'm being nice, or else you wouldn't be getting a 'second chance'" he stands up "now out of my sight" he says as the vines throw them straight over into the lake, which causes the naiads to disperse from suddenly having demigods thrown at them.