Seth Hevin

Appearance
Seth is a tall, bulky young man with short blonde hair, pale skin and dark brown eyes with black-discolored marks around them (a sign that an Osmosian has recently absorbed energy). His normal attire is a tight maroon sweater over a white long sleeve shirt, grey pants, and black combat shoes which is a spoil from his first crime: stealing a bike and using it to run away to New York. After absorbing an Omnitrix feedback, Kevin is able to transform into exact copies of all of the unlocked aliens, missing an Omnitrix symbol. After the energy overwhelms Kevin, he mutated into Seth 11, a random mixture of body parts from the 10 said aliens which completely destroyed his clothes, except for his grey pants.

Personality
He is very egotistical, constantly referring to himself as "Seth 11". He was a major foil to Dennis getting a chance to spend time with Angie during school. This behavior and mentality stems not only from being seen and treated as a freak by his peers and family, but also because of the side effect of Seth absorbing energy. His selfishness and sociopath-nature is made apparent when he was once willing to derail a money train to steal the money and kill countless passengers on another train. Kevin had an extremely negative outlook on life because of the countless hardships and struggles he had, feeling insecure about himself as well as having an incredibly low self-esteem. He had a deep-rooted hatred for other people and society in general, even the innocent as he once said "Nobody's innocent! They just haven't had the chance to make fun of me yet!".

Trivia

 * Seth's design strongly resembles Brad Morton from American Dragon: Jake Long.