My younger brother, this is going to sound kind of weird, but there’s something quite angelic about him. He has this way of, very calmly, just staring into someone’s eyes and it kind of feels like he can get into your soul. It’s a little weird and really kind of amazing so I did kind of base [Castiel] on my younger brother. - Misha Collins
Sasha and his brother Misha. Picture by Stardust and Melancholy; used with permission