Well… you don’t have to listen to them… for my first playthrough… Breden is a female and i married her, trust me choosing the path of marrying Breden will give you great surprise by marrying Breden, she gave me her “Kryptast” code, it shown how she love my main character and with the code, i manage to kill the enemy commander and obtain the powerful Magic sword… in the end, i chose to give the sword to Simon since he is the best swordsman and let him lead my rebel while i travel to Xaos Land with Breden 
… if Breden is evil , she doesn’t have to give me the code…and without the code, i won’t receive the sword… basically Breden is fiercely loyal to the main character
that is why even in my 2nd playthrough , where Breden was male and my Romance Option was Suzane… Breden was my 2nd in command and i still trusu him 