YES!
Hello! I'm a Tomas (well, I actually got Lucian, Ekaterina, Tomas and Janus as all results for the test, but I still consider it as a Tomas because it was my first result) and I just found like, the FIFTH Ekaterina in my life (I think it was fifth. Or did I just miscounted it?) I am also a BIG fan of the 39 Clues. And as the same as you, I LOVE Sinead Starling as a character, also her brothers, Natalie, Hamilton, Jonah, Amy and Dan (well in fact, I love all of them). I like Stalking people (as usual), spying on them, playing sports, writing books, and also wanted to be a Scientist (third ambition).
I. AM. ALSO. A. MUSIC. SPORTS. SPY. INVENTION. FREAK.