Memory is a high-level psychological activity based on thought.
It is also a kind of drink.
This drink is very popular among high-level demons, just as alcohol is favored by wizards. However, unlike real alcohol, it is not brewed with honey or fruit but distilled from the information that flows out of warm human brains under the stimulation of demon energy.
The esteemed captain of the Mist Ship is particularly fond of this drink.
Nikita, the cook aboard the Mist Ship, is always preparing ingredients, and thus she has this jar of "Memory." It is collected from the memories of Dreamland natives—rich in exotic flavors. Due to the differing laws between Dreamland and reality, the female demon was unsure if she could bring back the brains of those natives, so she pre-brewed these drinks and stored them in jars.
Now, this jar of drink will be presented as an offering to the temple in Wusa City.