When Harry saw that kid siting up in the bed next to him looking at Dumbledore and Ron and hermione he almost had a heart attack. He wanted to yell at Dumbledore for letting this kid in didn't he try to kill him.
He thought maybe he can take this into his own hands when he saw the boy turn his head. But he started staring at celling probably deep in thought so he thought this is the perfect time.
He still had his wand and he walked over to him carefully the he put the wand to his head. He was about to turn him into a frog when he saw him and jumped up super fast then knocked his wand out of his and and brought out a pen that turned into a sword and stood in a fighting stance.
He could see Dumbledore rushing and also Herminoe and ron's mouth hanging open.
When Dumbledore reached the kid he whispered into his ear and intimately the boy put away his sword and stood there looking sorry.
When Dumbledore looked at him he said,"this young one's name is Percy Jackson he is from America. This is harry potter." When he was done he thought Percy would look at him and say sorry but he just stood there.
They stood there for a minute not saying anything. The kid seemed to have been through something big. He didn't look mean but you could tell you did not want to get on his bad side. So Harry thought ok I want to be this kids friend so he went up to him and extended his and and said,"hello."
Percy looked at him in the eye and said,"hello, oh and I am sorry for the lake it's just umm." His voice had ease to it like he just took a shower he seemed to be hiding something."yea it's fine i'm sorry to for hitting you with that spell." He said.
"ahh no bigge."He said with a laugh.
Dumbledore cleared his throat and said,"well percy got here because some death eaters came and attacked him but he narrowly escaped." Dumbledore looking strait at percy.
At first he looked confused and then he said,"yea."
"what." both Harry and ron said in astonishment.
They both looked at each other because no one ever survives death eaters unless they are really good at magic.
"ummm Harry did I say something wrong." He asked him looking worried.
"Na." He said but he knew something was up.