James: The first thought came to James' mind is that you are not to be underestimated. James was impressed and also shocked at your reaction. He also felt challenged to make you change your mind of him as he realised who your twin brother is.

Sirius: Sirius can't remember the exact first but the earliest impression he got of you is that you can stand up for yourself and other people. Sirius was impressed by your reckless bravery at doing so, especially giving your's and his upbringing.

Remus: In a strange way, Remus felt protected when he first saw you swearing in the library. Remus saw how panicked you were over a minor thing you didn't understand. Remus felt protective of you as well, he wanted to calm you down and make you feel protected.