Whenever I see kaisa yeh pyar hain, something that hits my eyes first are the emotions that are transparent in the character's eyes. Here's what I see in each of the character's eyes.
(character's not the people behind the character's)
Angad : I see an emotional heart-felt in Angad's eyes, whenever he looks at Kripa. A look of yearning and love lingers in his eyes. Tears bring his expressions to look natural. It's more of Angad's eyes that speak before he utters something.
Kripa: I see lost-folorn look in her eyes. It's like a sharp look like she knows she's ruining her happiness, but somehow even though she is stuck on her decision to marry Prithvi so as to not break his heart, she does not seem satisfied with her decision, she seems to always look back at Angad, whilst on the other hand Angad showed a slight bit of satisfaction to know that Prithvi will keep Kripa happy--he doesn't seem to dawn on his sacrifice.
Mishty: A desperate look, she knows she's lost the match but her words utter out desperatenss.
Anitah: Prissy is all I can say
Naina: A sharp look, always on the look out, no wonder she figured out Angad-Kripa's love way before anyone, and was afraid of Kripa making a place for herself in Angad's heart---in the beginning. Dignity somehow also seems to reside in her eyes.
Dilip: less of concern but carelessness
Prithvi: A shy look, A carified look that fails to work together with his actions.