Ishaan might reveal all of this was a ruse but what can be his motive for entering Paakhis life? She's just a normal girl like Arohi or Ridzi before her?
Ishaan's motive might be connected to Agastya and not Paakhi. May be they are brothers like some predicted here. Paakhi will be just a tool to get to Agastya. Unlike Paakhi, sensible people can understand how much Agastya is besotted to her. So Ishaan might have thought to manipulate Paakhi to hurt Agastya.