Upen stayed cool the entire season save the last few weeks jab usne Gautam ki baja di. Had he really lost it toh Gullu baba ne seedha hospital pahuchna tha and Upen ne Police Station.
This time around though he has not come as a contestant but only for Karishma, so he has no reason to argue with anyone else. Baki sab jakr khadde mein pade, he won't be affected. He might warn them ki aage khadda hai, but Gautam jaise logon ko warn karo toh woh ulta baraste hain (case in point Pritam and Praneet ke saath jo chalta tha).
So Upen is chilling with Karishma. Which is awesome really. It would appear they have something special, jiske saamne end winning the show is a minor thing.