Doctor in Nikke World: Summoning Amiya at the Start

One moment he's leading Rhodes Island, the next he's waking up as Commander in the ravaged world of Nikke. Armed with the mysterious PRTS system, the Doctor discovers he can recruit operatives from his original world—starting with Amiya herself. But when Originium reactions appear in captured Raptures and familiar faces manifest on alien battlefields, the lines between dimensions blur dangerously. Can tactical genius and cross-world allies save humanity, or will merging realities tear everything apart?