Kim taehyung as Kim Si-Woo
•"I have been an angel for over a century, and as much as I love saving lives, I am tired. I want to live an ordinary life and be happy, but I suppose it is to much to ask"
•" Gu-won. I love you , but stop making coffee at 4.00 am ! I need sleep to save lives"
Song Kang as Jeong Gu-won
•"I never believed in true love, and I stopped believing in angels long ago. But Si-Woo... he changed everything."
•"Oh shit, I love him ! How is it possible ? A demon and an angel can't love each other, it's impossible!"
Kim Yoo-Jung as Do Do-hee
•"Si-woo is like my big brother and he is the best person I know, don't hurt him or I'll make sure the spontaneous combustion will be the last of your problems"
•"Si-woo, you can have a life too, stop being so selfless, for once, think of you"