Nothing is known about Cannot other than him being a strange man who wanders around Terra's wilderness to trade with anyone regardless of affiliation and allegiance, although he had some relations with the anarchists of Rusthammer. Cannot's goods are funny and unknown, but most of them are "good enough," giving him some reputation among his clients.

Behind his eccentricity, Cannot is an ambitious man who wanted the Terrans to stop fighting each other so that they could focus on fending off external threats encroaching the land. This is also why Cannot maintain a neutral stance with his clients; even if they are hostile towards each other, he will do business with them so long as they could bring progress to the bleak world of Terra.

(Source: Arknights Wikia, edited)