thx Aesculapius it is a great work and helpfull informations for any player .
after reading your post I did some tests about Marry . I had a boy of 16 years old wants to marry my 12 years old daughters with nice millitary traits . So, I accepted .. the girl had a brother of 18 years old and doing well in governing one of my sattelments and ops he got the " Minon " trait . I reloded the game from autosave and checked his traits and found him hadn't any kind of bad traits . Then , the marrige screene still there so I accepted again and he got the " Anger " trait . after doing this ( accept then relod then check his traits ) I pulled hip out the city before accepting the marragie and he didn't get any bad traits . He still doing well until now and I got another brother to him had a " understanding of Tactics " and " Deavot " traits . Finally, the point is when there is a guy you want him get your daughter's hand click on the small box in up right in the messege screene and it will minimize then any pull out any brother for that daughter from any city and they will not get any bad traits . I hope it will help .
thx for all