I really am not a fan of Sigyn at all. According to my research she killed Donald, albeit accidentally, and hid it by creating a clone of him to fool everybody into thinking he was still alive. Yeah, I've heard nobody liked Donald Blake but still it's pretty low of her to not fess up to what she did. She's like Bella Swan from Twilight before there were the awful Twilight books. I wonder if Loki ever stalked her and broke into her room to watch her sleeping at night like all good stalkers do.