[quote=@FamishedPants]
[@Card Captor]

How would Alex react if some dickhead assassin chick came up and carved her initials into his wall? Unlikely to happen, given her personality, but hypothetical scenarios are always nice to imagine. 
[/quote]

Not well, for a few reasons;

First is that he hates it when people damage his stuff. And carving anything into his walls in damage in his mind. And second is that he has so many protective enchantments on his house, that someone has to be pretty powerful to carve [i]anything[/i] into it. 

Alexander will essentially interpret that as a declaration of war.