He can also exchange items for Investment points, the currency used to purchase special unit contracts within the minigame. He can display a list of items he will accept by right-clicking and selecting "Commodities". Items the player has in the inventory and bank are highlighted.
Prior to becoming a Junior Cadet, he worked as a chef. At one point, he placed a dwarf in a raw pie and served it to Lord Marshal Brogan, who ordered a feast in retaliation.
This article on an NPC has an associated dialogue page. Click here for a transcript of possible conversations with this NPC.