Su was book smart and not very street smart so when the horrid events happened the Ravenclaw girl decided it would be wise to join and learn how to defend oneself. She was sacrificing precious study time but after receiving that stupid owl from her parents she'd decided that since her safety did not matter to them it mattered to her. Besides, she was two chapters ahead of the lectures so this wouldn't slow her down, right? Wrapping her arms around her form she stood in the outskirts of the crowd and listened carefully, nodding in agreement to what Harry was saying.