In Everything She Wants, Lucas was originally supposed to go to the baseball game with his father, but he had to cancel because his mother wanted him to eat dinner with the family and her date, Greg. Lucas tells Mia that now he won't see his father for a month, and considers him the only person he can talk to, besides Mia.
In Jane Says (1), he returns after having been estranged for a quite a while. Everyone is excited to see him, except Jane. While his visit proceeds, Jane realizes that he molested her as a young girl.
- Carlos is the second character to molest somebody as a child. The first was Liz O'Rourke's mother's ex-boyfriend.
- Lucas idolized his father prior to Jane Says.
- Carlos, along with sixteen other characters has sexually assaulted someone:
- He molested Jane as a child.
- Damon King forced himself on Stephanie.
- Coach Carson tried to have K.C. have sex with a hooker against his will as well as had him watching porn.
- Lovequeen16 almost molested Connor in her car.
- Mr. Colby sexually harassed both Lucy and Susie.
- A random stranger almost molested Wheels in his car while Wheels was hitchhiking.
- Liz's mother's ex-boyfriend molested her when she was a child.
- Jordan held Emma captive in a room and almost raped her.
- Dean raped Paige at a party.
- Anson almost raped Bianca.
- Vince forced Bianca into sex on numerous occasions.
- Asher sexually harassed Clare.
- Neil sexually harassed Maya and has taken advandage of and gang raped Zoë alongside Luke.
- Luke has taken advantage of and gang raped Zoë alongside Neil.
- Grant Yates statutory raped Tristan and attempted to grope Winston.
- Owen tried to force himself on Alli after she rejected him. He also sexually harassed Anya twice.