He was portrayed by Michael Grant.
Ethan is Ricky's 14-year-old foster brother who ran away from their house a few years after stealing a knife from Margaret and Shaker.
He first appears when he gets in trouble for sending naked pictures of his ex-girlfriend to everyone in his contacts, which ultimately lands him in juvenile detention.
Margaret decides to take him in again and forces him to go back to school.
In season 4, Ethan is forced to go to summer school and immediately gets into trouble for stealing condoms from the nurse's office.
Despite his actions, Ricky still tries to install sense in him remembering his early days before he met Amy. He begins dating Kathy, who is pregnant with her ex-boyfriend's child.
They decide to take their relationship slowly, but Ethan has trouble respecting Kathy's boundaries such as when he meets the prospective parents of Kathy's unborn daughter, and asks rude & personal questions about them.
Kathy breaks up with Ethan when her prospective parents think he is too unstable to be around. Ethan later confides to Kathy that his biological father stabbed him the calf when he was a kid, causing his distrust in adults. He also reveals that his biological mother abandoned him when he was 8 years old.
After meeting Kathy, Ethan tries several times to get advice from Ben on how to be a good boyfriend to someone who is having a child with another guy, but Ben shows no interest in helping him.
In the episode "Holy Rollers", he is shown to be a talented piano player. Then he and Amy start getting closer and closer while Amy and Ricky get farther.
In Regrets, Ethan tells Kathy that he's not afraid of falling in love with her (and he probably has fallen in love with her by this point). Kathy quickly breaks up with him again, per the advice of her picked adoptive parents.
Ethan is very upset by this, and quickly figures out the reason behind the break up, and broadcasting it in the school hallway. He is later approached by Kathy's supposed friends, who tell him that Kathy wants him back, and Ethan declines. Seeing their chance, the two girls then make a play for him, and Ethan flat out refuses.
Out of spite, Kathy's friends tell her that Ethan doesn't want her back. Kathy, heartbroken, gives them permission to pursue Ethan, and they leave her behind in triumph, while Kathy is left to cry in the same hallway in which she broke up with Ethan.
His senior mentor is Ben and in Half Over, Ethan attempted to get advice from Ben.