Eugene is Whit’s dependable, eccentric genius of an assistant. Whether he’s working at Whit’s End, teaching at Campbell College, or developing another big invention, Eugene knows everything about everything (or thinks he does).
After an on-and-off relationship lasting several years, Katrina Shanks finally married the relationally-challenged Eugene Meltsner. His mental equal in every way, she is a softer, non-hysterical version of Eugene. The star-crossed intellectuals were born to be together.
When he first appeared in "The Green Ring Conspiracy," Buck Oliver was a deceptive yet highly intelligent fourteen-year-old. After his time in juvenile detention, Eugene and Katrina brought him into their home as their foster son.
Jason is Whit’s youngest son—and in many ways, he is a “chip off the old block.” Most of Jason’s life was spent as an “analyst” and operative (in other words, secret agent) for the National Security Agency, just like his dad. And Jason also inherited his father’s love for inventions and tinkering with gadgets—especially the high-tech kinds. But while Jason possesses Whit’s sense of adventure, he does not possess Whit’s patience and wisdom, which results in Jason’s often reckless, impetuous nature. He is a “man of action” who sometimes leaps before he looks.
Penny became friends with Connie through an art class and is now her roommate, even though she occasionally drives her crazy. Penny is a Christian, but she's immature in matters of faith and is easily taken in by deception.