Heinrich Von Marzipan is Numbuh 5's morbidly obese personal arch-rival in candy hunting. He/She is based on the Nazis from the Indiana Jones films, and is stated to be the son/daughter of a famous German candy maker. He and Abigail have known each other for many years and have a largely unexplained history. They likely encountered each other in independent treasure hunting activity. The two became enemies after a mysterious incident in Guatemala five years ago that that culminated in him being caught redhanded with a bag of stolen candies and being grounded for a month.
Heinrich first appeared in Operation: J.E.W.E.L.S., where he opens the hidden tomb of "King Two Tons-of-Candy" with a Blurpleberry Jewel stolen from Numbuh 5, and upon doing so turns into a giant candy monster. Due to him not sharing any of the candy, however, it tastes like asparagus to him, and he tries to destroy Abigail for "sabotaging" his candy. He is returned to normal when Numbuh Five reclaims the candy jewel.
Henrietta Von Marzipan and Heinrich both have blonde hair and blue eyes.