The stormrider at the end of Night of Knives took over the grandfather (soul shifted) who went to investigate, like Ruthan took over whoever's face he is now wearing with the beard. (Makes you also think about the similarity when Quick Ben becoming Rool the Rude and Tayshrenn did not recognize him.) The 'she' who gave Ruthan stormrider armor and 'responded like never before' must have wanted him to live through the attack and so a mother makes sense.
Arathan was drawn to ice, when he fell through it, it made him grow older much faster as per Envy/Spite and when he had that dream about babies that mothers took from the ice well I think it was, when travelling with Draconis. Plus he wants to stay with Gothos and the jaghut will become ice aspected if they aren't already. As an aside, Edgewalker in N of K says the ice intruding into shadow does not belong there and the ritual that called it still bruises the realm. That ritual could have involved the jaghut/KG and the stormrider realms.
There may need to be a common denominator to join two realms like that and could that be an azathani? The only azathani linked to Arathan is Draconis. Draconis who is aspected to the Tiste and is hanging out with the tiste of KG. Now remember back to Stonewielder and Shell's mention of how the dead stormriders looked like the tiste andii she had seen except their skin was pallid.
Hummmm, conclusion could be Draconis tiste cross realms and Arathan's mother is a stormrider tiste. If that is true, it could mean it is possible the 'she' who clad Ruthan in stormrider armor is Arathan's mother and therefore Arathan could be Ruthan.
This post has been edited by ShadowOwl: 12 March 2013 - 05:59 PM