Go with Rias

You followed Rias to the school dorm.

When everyone was gathered, Rias said: "Everyone, we are going to have a rescue mission..."

She explained the situation.

Ameno asked: "How do we find her?"

"There is a group of Fallen Angels in this city, who is hunting rare Sacred Gears. This must be their work."

Rias turned to you: "Do you remember the girl who killed you?"

You nodded. The memory was still fresh.

"She's the leader of that group. Since that night I tracked her trail and found their base: An abandoned church at the border of the city."