What AoA said, I mean if my older brother lost my younger sister in a raging river in a foreign land I'd yell at him too! Dude, if my older brother even let my sister get hit by a car I'd yell at him. I didn't find her annoiying, I found the character portayed very well, because as an older sister, thats what I would have done in best intrest for her family. She didn't want to go in because she followed the rules, her mother had put an enourmous weight on Susan and Peter's shoulders by putting them in charge so Susan took over the motherly role, but if she didn't get her siblings back from a magical land they found in a wardrobe they'd have to tell their mother. Just think about it. If you were put in charge of your younger brother and sister...one who didn't like you and the other thought they found a magical land...what would you do? Then just to find out that the magical land in the wardrobe is REAL and now one of your siblings is off with a witch in this land...I'd be pretty frusterated to. Not to mention her brothers getting in a war...when there was already a war at home. Its WWII in London...things were scary. You HAD to be logical in order to survive...and then a war in a magical world in a wardrobe...thats not reality! Does that seem like reality? As an older sister I would have been very much like Susan...obeying the rules, trying to think logically and keep all of my siblings safe. She is only suppost to be 12 in the movie...I think it is very realistic and not a tad bit annoying.