So could she have set up something and is speaking to a crowd of members since most of them had heard of the group before anyway? I was thinking something maybe like this...
"Team Amethyst!" She addressed the crowd, which immediately fell silent.
"Our numbers are growing as is our strength!" Her voice spread easily through the room and she glanced over the group of new members. They weren't as much as she had expected, but they would have to do. "I know that you have all gathered here to fight for our cause, and the time to do so is now."
The pager vibrated at her side and she looked down, reading the message that scrolled across it. A smile prickled her lips.
"In fact," she said, looking back over the group. "Your devotion to our Team shall be proven now. Members of the enemy Team have entered our city, and you need to make sure they don't leave again."