The lost boy. The lost boy who finds his way thanks to a loving companionship with his best bud, Haley and two serious relationships with Loving girls who teach him different things, and make him a better person then he already is. His journey of growth is filled with innocence, deception, betrayel, hardship, learning, true love... and A LOT of mistakes. He isn't perfect, but he is just trying to find his way. His purpose is to learn to trust certain people but to learn about the world and how to deal with it, and learn how lucky he truly is. He has great friends, true love, and people all around him willing to help him through everything. Even, a brother. His purpose was also to give Nathan hope and something in his life- which he did without knowing it. He gave him Haley, without even realizing it. And without Lucas, Nathan wouldn't be a person. He would be a selfish, prejudice, probably HIV positive, JACKASS. He might have been a HUGE basketball star, but there is no way he would have had a heart.
Lucas meets all these knew characters, they all have skins that are so different then who they are inside. And Lucas's purpose (along with Haley) was to open their eyes to the world, and teach them how to unleash their true personalities. And he was successful.
Lucas might be a dissapointing Character now, but we all know he is going to get better. He is going to become a much better person. He is just a human, he is still finding his way.