This is Stinger from Project Phantasma's Armored Core. That same laconic, proper, and cool Stinger from the PS1 game, unlike the version from Armored Core 2: Another Rage, where he looks more like a concentration camp victim with terminal anorexia. Incidentally, the same goes for their Seraph, but whatever. Basically, a fan of throwing water in your enemies' faces from a glass, at your service.