Ethan and Aiden

The characters are identical twins and have the ability to merge both their bodies into a single large creature. The mechanism for this transformation has yet to be explained.

They are members of The Alpha Pack. While three members of the pack claim to have killed their own packs in order to become “faster and stronger”, it has not been explicitly stated that the twins did the same.

According to Lydia Martin, Ethan is gay. This belief is supported onscreen by his interest in Danny.

Ethan is played by Charlie Carver while his identical twin brother Max Carver plays Aiden.

Season 3
The twins attempt to capture Isaac Lahey and a mysterious girl. On foot they are able to chase down and almost catch the motorcycle on which Isaac and the girl try to escape. After the bike wrecks, they merge into one giant alpha and begin to charge Isaac and the girl. An electrical bolt fired from a "modified tazer" causes them to split back into two separate individuals. Later, they appear at Beacon Hills High School and attack the mysterious girl again, along with the rest of their pack. (read more...)

Ethan and Aiden are seen in friendly conversations with Lydia and Danny in the school library. (read more...)

Ethan and Aiden attack Isaac, then frame him for attacking them. After Scott and Isaac mess with their motorcycles, the twins merge into one to take on both boys. They only stop when Deucalion shows up. He punishes them by slicing both of them across the cheek. (read more...)

Ethan sits with Danny on a road trip with the Cross Country team after the big Alpha Pack battle with Scott and Derek's Pack. Aiden is shown in flashback making out with Lydia. He later helps Kali get treatment for Ennis from Dr. Deaton. He comforts her after Ennis dies. (read more...)

Ethan rooms with Danny during the team trip. The pair make out until Ethan begins to hallucinate and leaves to try to kill himself. Stiles stops him. In the morning, he tells Scott that Derek is still alive. He blames him for the death of Ennis and says either he must join their pack, or be hunted down by Kali. (read more...)

Ethan comes into the hospital while supporting Danny on his shoulder yelling for somebody to help him. Melissa and Scott help seat Danny down. Scott asks Ethan what he did to Danny. Ethan tells him that he didn't do anything and that Danny was saying he was having chests pains and trouble breathing. Then, Danny vomits up mistletoe. Ethan is with Danny when he is getting treated by Melissa. (read more...)

Ethan is then seen coming out from the hospital telling Scott that he didn't do anything to Danny. Scott tells him that the minute they got there, Ethan went right for Danny and Aiden went for Lydia. Ethan tells Scott that they knew one of them was going to be important and that it was Lydia. (read more...)

Aiden is seen making out with Lydia in a classroom. Then, the fire alarm rings and Aiden leaves but Lydia is stopped by Cora. (read more...)

Both twins show up in the fight between Kali and Derek holding Ms. Blake. Towards the end of the fight they help hold and force Derek to kill Boyd before they leave Derek's loft. (read more...)

Quotes

 * "Ethan, I always forget, how many bones in the human body?" "I don't know. Let's count."

- Ethan and Aiden after grabbing Isaac in Unleashed