Because though Imlie introduced the art of talking to inanimate to the GOAT Aryan Singh Rathore . Aru was no stranger to the delicate art form himself.
With time Aru’s playfulness was lost or burned yo ashes with jiju. But old Aru could make jokes like bow tie is bahut tight and its arthritic dadaji because it has tied up joints. They are such bad jokes but so adorable.
I could see a polished and happy go lucky version of imlie in him. He didn’t take himself or the world seriously. And thats why it makes sense that Aryan was so protective of Imlie’s happiness from the beginning. Thats why she is perfect for aryan. She is that part of him he had lost long back.