Bill crossed his arms when Oliver asked to speak to him privately, nodding his head for him to continue. He frowned when he heard the question. He had originally tried to keep Percy out of it, this was true, but the more he thought about it the more unfair he thought it was. He had began to speak when he was alerted by the door opening again. He smiled softly when Angelina came in and she began to speak to Oliver. Her words gave Bill a sense of pride, and while his calm glance faltered a little when she mentioned Fred, she was right. Weasleys were fighters.
"I was hesitant myself about letting Percy in on this, we argued about it for a little. I don't want any more of my family hurt, I don't want to see Percy get injured, but he's an adult and he's a damn good wizard. I have absolute faith in him. You should too." He said slowly. He believed that Percy could take care of himself, but as his older brother Bill still felt responsible for Percy's safety especially now when there were so many dangerous people running around. He didn't want to loose another family member. "And since Percy is very capable, and we have such few people, we need his help."