Expelliarmus
"Seriously Percy?! If you're so disappointed in all of us what are you doing here?!" Ginny shouted.
"Because, it's my duty to make you all listen before it's too late. You could end up in trouble with the ministry, it's embarrassing." Percy retorted. "You all need to have faith that-"
"That what? The ministry hasn't been living in denial for years?" Ron demanded. "Merlin Percy you're such a prat."
"Ronald calm down." Hermione sighed. "Percy, how about you sit down and talk with your parents rationally about all this? Listen to what they have to say and then if you're still convinced they're wrong then you can say your piece too."
"Hermione, I'm disappointed in you, you used to be so reasonable." Percy sighed.
"I am being reasonable, look at it this way...if I'm normally reasonable why wouldn't I be now?" she asked.
"Yeah if Hermione is siding with us you know it makes sense." Ron added quickly.
"Look Hermione, you need to stop getting involved in family affairs, this isn't your family so you need to leave them to me." Percy told her firmly.
"Percy?!" Ginny snapped in horror. "Hermione is like a sister to me, I care about her more than I care about you right now!"
"I think maybe you ought to leave big brother," Fred spoke up.
"Don't want your little sister hexing you now do you?" George asked.
"I'm a Ministry official, you can't attack me." He replied indignantly.
No one would ever remember exactly who said what or who pushed who first but in the next few minutes a ball of red hair and moving limbs took over the living room. Hermione and Ginny looked on in horror as the fight seemed to accelerate. Both girls tried to grab a Weasley in attempt to break up the fight. Ginny got Ron out of the fray. Hermione got Percy, who quickly shoved her off of him. Hermione fell backwards against the coffee table with a shriek.
Charlie and Bill seemed to appear out of nowhere and started to attempt to pull their brothers apart, this only resulted in them moving onto drawn wands and hexes.
"Expelliarmus!" Molly's voice roared. "I am absolutely disgusted with you! What do you all think you're doing?!" Everyone looked rather sheepish for a moment before some opened their mouths to make their excuses. "I don't want to hear a word, all of you sit down!" It was then that Fred noticed Hermione still sprawled across the floor and offered her a hand up.
"Hermione dear, are you alright?" Molly asked quickly. Hermione nodded but didn't say anything. "Ginny?" Ginny nodded also. "Right, I don't want to know who started it and I don't want to know whose fault it was, I just want you all to stop immediately and not to start fighting again under this roof! Do you understand?!"
A chorus of "yes mum" was heard throughout the room in response. Molly grabbed Percy first and then dragged him into the kitchen to heal his injuries. Ginny healed Ron's nose and Hermione did Fred's forehead. She moved onto Charlie's split lip and Ginny to George's black eye. Bill say smugly without injury at all. Never a dull moment around the Weasley's.