Greasy (Adam Winfred Lambert) is a student at Whateley Academy. He's a devisor. He has a serious case of GSD -- his skin exudes an oily substance, which he keeps under control with an artificial skin of his own invention.
He's rather thoroughly under his roommate Peeper's control, and seems to act like he's in love with Peeper despite the constant physical, verbal and emotional abuse John inflicts on him. His inventions tend to support Peeper's program of sexual harassment.
He first appears in A Simple Game. He's one of the main characters in Christmas Chicanery. He was savagely beaten by Solange in Even Murphy's Law has Loopholes: Chapter Four, leading the other tech-heads to invoke the Order of the Worn Wrench on his behalf.
Several months later, after undergoing a change of heart, Solange tried to make amends with Adam by helping him find a girlfriend and move away from John's domineering and abusive 'friendship'. Unfortunately, she fell back on bad habits to do this, telepathically reinforced his self-confidence without his knowledge. What the long-term results of this will be aren't clear yet.