If Athalus does give Keri blood she will definately get Lyn out of there. As well as a protect her. Keri is what I like to call a flawed character. When I say her body remembers specific traumatic events I mean it. It's like her sixth sense in a way. As well as a warning system to others as well as her 4 different eye colors which are red, crimson, blood, and black. With Ellys it will be pain in her limbs. With her maker her scar become as clear as the day she was turned. And so forth... Granted she does tends to go beserker mode when her eyes are pitch black and so much amount of pain snaps her out but it's instinct so she can learn. Ex: Ellys used her tail mainly then her spear. If Keri ever faces her again she'll know what attacks to do and what attacks not to do. It's how I make my pcs. This is one of the reason I don't put my heart fully into the CS.