/jp/ - Otaku Culture

Caster route - Very early in the game, Issei asks Shirou to help him out at the temple to fix something important. Shirou agrees, and when he's done and its dark out sees Caster stumbling along in bad shape. He goes to her and she passes out in his arms. He takes her home and feeds her. She grabs his arm and tells him her story, and is happy to realize he's at least a magus, even if a weak one. She asks him for mana transfusion. Shirou is reluctant because he has no experience with sex, but ends up giving her tender lovin to save her.

Seeing opportunity, she doesn't become his servant, she uses mana transfusion to sustain herself and limits her activity to teaching him to conserve her mana. She helps Shirou summon Saber. Shirou x Caster x Saber commences. Caster finds a way to drain small amounts of energy from the populous without actually hurting them. The three of them proceed to absolutely dominate the other masters. Caster/Shirou/Saber mana transfer threesome occurs. Kotomine realizes how deadly they are and has Gilgamesh go and capture a weakened Caster while Saber and Shirou are out. Shirou becomes enraged and they confront Kotomine and Gilgamesh at the temple. True end has Saber destroying the grail and returning to her own time with Caster staying to live with Shirou as his lover, Good End has a theesome end where Shirou is able to maintain them both.