"Really," Nigredo affirmed, though he could not blame Klavier and his disbelief. Rubedo was far from a model soldier in casual conversation. "He takes his responsibilities seriously, even if he can be rather frivolous other times." And immature. And cocky. The list could continue, but he had already delved too far off track.

"Good. Here, then, is the connecting factor." He inhaled nasally. This portion required precision to convey as going into specific details was forbidden, in more than one way. "Despite how effective it is, Rubedo's power is highly unstable. Should his emotions go out of control or should he break down psychologically, this power has the potential to overtake him. A berserker, you can say." A term that hopefully needed no introduction.

"To prevent the worst, Father created a fail-safe system. Someone to control and subdue Rubedo should he lose control." The child trailed off. Klavier could put two and two together, and Nigredo did not have the energy to save it outright.