Jakkob is Massie Block's hair stylist who has created many of her hair styles throughout the series, including extensions, highlights, and bobs. In The Pretty Committee Strikes Back, Massie makes a 5 A.M. appointment between he and Claire Lyons to fix the bangs that Layne Abeley had cut. In Sealed With a Diss, Jakkob does Chris Abeley's hair and makes it look like Zac Efron's. He also gave Massie a super cute half up half down hairdo for the valentines day dance in Invasion of the Boy Snatchers.
Jakkob has also been known to give Massie good advice, and coach her through her problems.