"Tareeka galat hou toh sahi cheez bhi galat hou jaati hai, aur yeh tum dono ke saath hua hai"
Kairav rarely speaks, and we keep taunting him for it, but the one line he spoke that day to both Akshu and Arohi actually summed up what he felt for both of them. Akshara wasn't wrong to fight for her love, Aarohi wasn't wrong for being ambitious, but both of them went about it in the most stupid way possible. Akshara's mistake was to not account for her timing and her place, and that ended up painting AbhiRa as the villains in the story. But Kairav also knows that Aarohi was equally wrong, that while she may appear to be a victim today, she isn't one, and he actually manages to tell her that.
"It is difficult to constantly stand up for the person who refuses to stand up for themselves"
I have noticed that Kairav only speaks up for Akshara when she speaks up first. It happened at the tilak, and then again at the wedding. We don't actually have an outline of what happened during the leap, but we can predict that Kairav's initial attempts to stand up for Akshara were shut down by Akshara herself, to the extent that Kairav himself gave up. But now that she has started standing up for herself, her love and her dreams, Kairav will definitely support her. This was actually shown in Abhi and Kairav's conversation where he tells Abhi that despite their efforts to convince Akshara that she was in no way responsible for Sirat's death, however, it is Akshu who has been unable to forgive herself, no thanks to Aarohi's ranting.
TLDR here is, poor Kairav gets blamed by the fandom for being quiet and not forceful enough almost all the time, but jab banda bolta hai, he manages to piece together the limited information he has properly and actually sahi baat bolta hai, surprisingly insightful hai.
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