Rin had ordered him to stand guard outside, so up to the roof of the compound he went. It gave him a little bit to process everything that was going on. He'd been summoned by Rin to this time as her Servant in the Holy Grail War. He struggled to remember what had happened. He vaguely remembered fighting himself. The red-clad, white-haired Archer he remembered looked exactly as he did now.
"But I don't want to kill him. If anything, I want him to know that it's okay to chase ideals, even if they are broken or borrowed." He says to himself. It was also because of his clash with that Archer that he got to be as skilled at his craft as he was. Something was going to change here. He was going to make sure that this version of him knew that his ideals were bankrupt, but that it was okay to pursue them anyway.
"I'll have to help him find a way to unlock that as well." He murmurs to himself. Just then, Rin called to him telepathically.
"We're heading to Kotomine church. The one on the hill in Shinto. Stay close by."
"As you wish, Master." He replied. He couldn't help but chuckle at the sight of Saber in the yellow rain jacket.
'Brings back memories.' Archer mused to himself as he followed the trio through the streets. Saber settled to stand guard outside of the church gates, and he took up a position on the rooftop, next to the steeple. Leaning against the peak of the Church, Archer glanced around at the landscape around it. Images flashed through his mind. He was seeing phantom images of when he was here last. He couldn't make out what the phantoms were saying, but he watched the younger Shirou Emiya and Rin run into the church, leaving the blue-clad Lancer to square off with his counterpart.
'That won't happen this time around. I'd never work for that vixen.' He thinks to himself. He took to trying to remember things closer to where he was in the time frame. He focused his thoughts, panning the terrain around him. His eyes settled on the graveyard. More phantom images appeared before his eyes. He watched Saber dance between the headstones, dodging the stone axe of the giant monster that was Berserker. He watched an arrow fly into the area, and cause an enormous explosion.
'Caladbolg?' He wondered. When he saw Berserker emerge from the blast relatively unscathed, he mused what in his arsenal he could use to defeat such a hulking monster. He eventually settled on Caliburn, the Sword of the Selection. He didn't know why he felt like it would work, but something told him it would. He noted that Rin and Shirou had emerged from the church, and resumed his spirit form.
After walking for a while, Rin stopped. Shirou and Saber stopped a few steps behind them.
"Alright, you can make the rest of the trip back by yourself. I've done what I can to help you. Next time we meet, we're enemies."
"What? What are you talking about Tohsaka? I don't want to fight you." He said.
"Do you still not get the fact that this is a war?" she said. "Eventually we will have to fight, like it or not." Shirou was aghast. Saber was tensed for battle, but Archer was nowhere to be seen, despite that his presence could be sensed.
"Well now, are you done talking?" a small voice called out to them. A small, white-haired girl was staring at them. Standing beside her was a massive, hulking monster that was her Servant, Berserker.
'This is it.' Archer thought.
"Archer, get somewhere that you can snipe from." Rin said to him. He quickly left the scene, moving as quickly as he could to the roof of the building they'd been on two nights ago.
"Oh, sending him away already? Oh well, that gives more time to focus on my real objective, Shirou."