http://www.hp-lexicon.org/w_people.html
there is an awesome page about Sirius there and you can get some descriptions about the diferent characters.
P.S. could someone tell me how to throw a link into a post!?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The Difference between genius and stupidity is that genius has it's limits.
Things you need to know:
1. 4 is an evil number.
2. Chickens will take over the world.