Agate (Given the acronym 'AGT') is a tall and stick-thin man, and looks like he could, at one time at least, have been a pretty-boy. Now he's far too gaunt to look particularly attractive. He has your typical blonde hair and blue eyes combination, and almost strangely pointed features--pointy chin, almost pointy ears, arched brows, gangly elbows and knees, etc.
He wears scavenged clothing--which means that every time he finds something new, he adds to the pile of clothes he's wearing already. At the moment he's typically seen in several mismatching sweaters and a discreetly-women's fashion black coat with a high collar, two pairs of pants beneath bulky, clown-sized jeans supported by burningly bright red suspenders, over which the remnants of something hospitals green (a hospital gown) still hang. He keeps on him at almost all times a ratty grey (white?) toque and a pair of one-size-fits-all-but-doesn't-fit-really gloves, leaving a gap of exposed skin between his wrists and lower forearms. His feet are covered by large black, well-weathered army boots. (Don't ask how he got them!)
Agate has amnesia, having lost most of his memory since his recent undeath. Despite this, he retains his sarcastic, bitter sense of humor, and an... interesting vocabulary. If approached on friendly terms, he's quite a nice guy; if faced with hostility, he typically goes with verbal-smackage before running shamelessly away.
Lately, he's rarely apart from the side of KTFE, his short and hot-headed companion. KTFE says that they knew each other from before the quarantine, and refuses to leave his side. Whether or not her knowing him is true or not, he doesn't really care. He's thankful to have someone close while going through this horribleness.