Love gives me Wings~

So Jin have been leading a simple life. As simple as you can think of, going to school on weekdays, working part time on weekends. You can't say she's smart neither is she stupid. Just that she have a sad family background. Her parents are gone. In a fire. In her darkest time as a teenager, no one is there with her. She walked out it herself. She's emotional strong. Just which type of guy can make her waver and have a personality change?