Spellsmith

Eventually, they entered the Brilliant Emporium. Aiko was away, running errands beyond the Ivory Island — while Sunny and Nephis had enjoyed some respite, she had been busy in these last few days. 

The logistics of an Awakened army were unusual and complicated. Soldiers would inevitably earn Memories as the number of battles and skirmishes mounted, but not all of these Memories would suit them well. Therefore, an elaborate redistribution system was required.

Usually, a dedicated quartermaster would handle these matters within the unit and cooperate with other units to help Memories find suitable owners. The Fire Keepers were far fewer in number than the other legions of the Sword Army, but their kill count was disproportionately formidable — and, therefore, the number of Memories being purchased and sold by them was quite high, as well.

So, Sunny had to do some actual work as their nominal Memory Purveyor… or rather, he had to make Aiko do it for him.