I think you're thinking of Myth-tern Jess, the winner of some contest they had years back and living embodiment of the theory that pretty girls do not, in fact, need to bring any valuable skills to the table.
Speaking of Mythtern Jess, did anyone else notice she spent an inordinate amount of time on camera with Jamie, getting eye-raped by the latter? Those two fucked. I guarantee it.
Jess didnt even win. they just liked her I guess and invited her back. she popped in a few times later to help build things, but besides that its been the core 3 for the build team.
according to wiki, she is on parental leave, which makes sense. I do think though, that when she comes back she will join in with jessi and by the end of next season sort of leave, similarly to scotty.
I did enjoy kari's demeanor on the show and Jessi's is different.
Ive noticed the show becoming more kid oriented. maybe it is because i am 16, so I watched when I was younger and now I see the annoying additives, like on the episode where the jumped the buss, they had that "scene" where tori pulls the bus cord and grant is like "get off the bus"