As soon as Shuhang made it up the stairs and into the main temple ground, he found the girls standing in circle of a defeated Caster. She was absolutely 'rekt' though judging by her burnt and torn robe. Lying unconscious right next Caster was the defeated form of her master, Souichiro, a teacher at Rin's high school.
For some reason or another however... there is one Emiya Shirou standing a bit to the side as well.
"Oh? I'm actually surprised Castor is actually still alive and kicking. Then again... this is her 'territory'. Or rather! What's little 'Hero-kun' doing here anyways?