MANDO (also known as FIX-IT GUY) is a character in OMORI. The man usually found behind the counter at FIX-IT, FARAWAY TOWN'S hardware store. He's generally uninterested in a whole lot other than trying to get money, often appearing bored or falling asleep while on the job, even while there's an open book about how to get rich quick at his elbow. [some description pulled from the OMORI Wiki]

A dry, uninterested, or tired tone would be great. Picture overworked college student at a part-time job who is clearly not paid enough and you'll have the energy you need for MANDO. Medium pitch.