Harry didn't know what anything was and he didn't even know what Lia was here to do. So he just waited patiently as she let a bunch of orbs into the air above them. "Hey there's Hermione," he pointed out when he saw her name. He recognised a few more, but was aware he was just stating the obvious after that.
"Yeah, looks good," he agreed. He didn't know why the X had to stay X if she knew it was a Lestrange though. Harry wouldn't care if she named him.
Ok, she was ready. "Am I meant to do anything?" he asked.