Hmm, this looks interesting!
Not only Miriam is Aberdeen’s sister, but she’s an automata. Except that she has a core that is unstable. Maybe that’s the reason why Aberdeen and Avril wants Minette’s core. Should they find the “Heaven’s Waterwheel” artifact instead? Maybe they’re lazy to search that lost artifact.
For now, here’s a fanservice shot by Ritos to calm ourselves for the next episode!
The Anime Rambler - By Benigmatica 
