|(Bernard Walsh/History) http://tvshowpatrol.com/news/vikings-meet-ragnar-adult-sons/|
Where Aslaug is Ivar is to be seen most of the time. We see a little fragile child at first but when we see him in the time before Yule when Ragnar wants him to decorate like the other children he refuses to do that. When Aslaug and Ragnar get a fight about him Ragnar refuses to tread him like a cripple where Aslaug tries to get him as spoiled as possible.
Ivar has an own mind and this turns him into something different then the other children of Aslaug and Ragnar. When Harbard returns to Kattegat he take away the pain of Ivar once more.
Aslaug ask Floki to teach him about the gods and how to be a Viking he gets to see Ivar every day. If children are playing outside Ivar wants to play when Floki puts him in between the children Ivar at first lose the battle about the ball when he gets it. The second time it happens we see Ivar do something different he kills the child when he is about six years old.
When we see Ivar again he is grown-up. What we see is Ivar defending his father and we see a big difference between him and his brothers. He is the one that only believes Ragnar did what he had to do and that he is still their father. Curious and admiring his father he wants him to return to Kattegat.
If Ragnar arrives in Kattegat and first speak to Ivar, we see Ivar grow and the acknowledgement he gets is great. I for one had the feeling he want to attack Ragnar but didn't and saw a disappointment in him when Ragnar was shouting "Who wants to be King?"