When he thought, no one would understand him, when he thought, he deserve to die, when he thought he is some monster, at that time, it was her, who didn't left his hand, who treat him, who heal him, both physically and psychologically, who strengthen him, who bring him back to the living and the mission.
He knows Riya will hate him for the rest of her life. But, it doesn't matter, he did what was the need of the situation and he won't feel guilty for that.
Even if she hates him, it would be her choice. Even if she despises him, it would be up to her. Even if she wanted to kill him, that would be her decision. But he knows, he has someone to protect, to save till his last breath.
He will protect this little candlelight, as long as he can. No matter what.
Finally, he let go of the girl, who whined for being hugged way too tightly, bringing the smile which has been lost since the missing incident back on Raj's face. And when he smiled, then Kia smiled.