Chuck is an archangel who is mentioned in Is It Not Nifty?[1]
Chuck is summoned by Riff to battle Satan, who he had previously summoned into his computer. Chuck and Satan get into a Quake deathmatch, with Satan wins. Riff then exorcises both of them by putting an Alanis Morrisette album in the CD-ROM on an endless loop, causing them to flee within an hour.