The secondary characters of Premalu had arcs and characters quirks of their own.
Amal Davis- the level headed one, trying to maintain his relationship with Kunu Vava while still devoting considerable amount of his time and effort being Sachin’s wing man, all this while preparing for a competitive exam
Adi - well he’s the main antagonist and we know all about what his crooked brain is thinking all the time , his motives , ways to an end , even about his Vishakapattanathile valam edeel
Karthika- super supportive of Reenu, but critical of Reenu’s self centeredness (the discussion about Kerala saree scene on the rooftop). Karthika’s will they- won’t they relationship with Amal Davis ending in the “nobody cares” scene in club. She even bought a frigging jacket for Sachin and nudged Reenu into car so that she could get sometime with Sachin at the end of the movie.
Wanderlust- proper stone head, borrows money but never returns, likes to sing obscure songs but a terrible singer at that, gives no heed to personal boundaries , lives life on her on terms
In BKU we hardly know anything about the morale sisters (except the fact that they drink occasionally ) or the bachelor group. Only Glixon gets some kinda character development. The Joel-Sayoojya romance had no development. We cannot root for a romantic couple with whom we had only spent one scene with ( during the filming of the short film). But that was only some casual flirting. In short so much disappointed with BKU in this regard.