Rumors and Reputation

Rumors and reputation are probably the most powerful things in the world.
Depending on who tells you, you will believe a rumor immediately, normally probably not making even sure it is true.
If you have a good reputation, no matter how ridiculous what you say is, people will trust you much more than they would somebody with a bad reputation.
If you have an amazing reputation, you probably will be popular and liked by most of the people.
However, if you have a bad reputation while everyone around you has a good one, you will get obsessed with the idea of having also one like that. And maybe you'll just abandon everything, only to get it.
At least this is what happened to my brother. Who is he? Let me present myself.
My name is Katherina Lupin