We can see here that Pakhi looks very smitten by Adhik, but he seems casual.
While their relationship is a possibility, it seems more plausible that Sara and Samar will be a conventional couple but Adhik will have ulterior motives with Pakhi.
In Sreemoyee, the guy who was related to Rohit was jealous of Rohit's closeness with Dithi and hence staged her kidnapping and planned her murder, and she fell in love with the guy who did the kidnapping for money. Due to his criminal background, nobody including Sreemoyee initially liked him but only Rohit supported the couple.
If the makers are going independent of the storyline from original, Pakhi and Adhik may be a couple, but I am thinking they may not be end-game as he is clearly not liking Anupamaa's opinions overpowering her sister's and Pakhi's ultimate boyfriend may be someone else.
Plus as per the show's timeline, he is much older than Pakhi. Not that it matters, but it doesn't give me a good feeling. It will also be nice to see Anuj supporting her, even over Anupamaa, instead of Anupamaa's bhashans saving the day everytime.
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