Matz the Cleaner is an Imperial Tank Ace that appears in Valkyria Chronicles. His appearance is in Chapter 15: Citadel Ghirlandaio (Pt.1), where he commands an Imperial Tank Destroyer. Destroying his tank rewards you with the Edelweiss' Firing Calculator Part. There are a couple ways of destroying his tank. The first way is to climb the Sniper tower in the east and snipe down with a Lancer. While a little more luck-based, this also prevents you from getting shot after taking the base. As an added boon, if you miss often, your ammo refills completely due to your location near the base.