[Ruins of the Lost Kingdom] Causality (Faye X Heroic Spirit? X Merodack)

"...But if you get caught up in a dangerous war again, perhaps we'll meet on the battlefield. When that day comes..." "When that day comes..." "When that day comes, I'll definitely stand by your side." "Okay." A fanfic of The Ruins of the Lost City, with Fate's Heroic Spirit setting mixed in. This story comes from my frustration with Merodak's ending in the non-priest route. The ending changes depending on the route you take in the game. (Everyone: So now you want us to be frustrated too?) If you don't understand the situation with the white-haired Heroic Spirit, you can refer to Archer Emiya in Fate/stay night. It's another version of "the future meeting the present." That's all. Theme: