How do you romance Isabella in dragon age 2?

To romance Isabella in Dragon Age 2, you need to consistently support her decisions and show a willingness to embrace her adventurous spirit. Engage in flirtatious dialogue options during conversations, particularly when discussing her past and desires. Complete her personal quest, "The Pirate's Favor," and choose options that align with her values. Additionally, avoid making choices that would upset her, particularly regarding her friends and allies.