Kevin Ethan Levin, an Osmosian, began as a formidable adversary to Ben Tennyson in the original series, but eventually became a core member of Ben's team in Alien Force and subsequent series. He remained a key hero until his departure with Gwen in "The More Things Change: Part 1."

== Appearance == In Alien Force, Kevin, aged 16, was depicted as a tall, muscular young man. He typically wore a black T-shirt over a grey long-sleeved shirt, blue pants, and black combat boots. His hairstyle evolved into a choppy mullet. In Season 2 of Alien Force, he adopted a mechanic's jacket, reflecting his growing interest in vehicles. After a mutation, he used an ID Mask to disguise himself, sometimes reverting to this mechanic appearance.

== Personality == Kevin underwent a significant transformation in Alien Force. While retaining a penchant for con artistry and arms dealing, he matured into a snarky, laid-back individual. He abandoned his rivalry with Ben, joining him and Gwen to fulfill Magister Labrid's final wishes. Initially distrustful, he formed deep bonds with Ben and fell in love with Gwen, becoming a vital team member. He also developed a respect for Max Tennyson.

Despite his growth, Kevin's delinquent tendencies persisted. He often pursued money-making schemes, sometimes at the expense of others. However, Ben and Gwen consistently trusted him, offering him second chances. Kevin expressed gratitude for their compassion, acknowledging their positive influence on his life.

Kevin channeled his delinquency into a passion for cars and automotive engineering. He was fiercely protective of his vehicle, constantly upgrading it, and was visibly distressed when it was damaged.

He demonstrated a natural affinity for animals, earning the loyalty of creatures like a Blowfish and Zed.

Kevin's moral compass improved significantly. He displayed a strong sense of justice, expressing disgust towards those who exploited the innocent. He reprimanded those who acted selfishly or cruelly. He even chose to forego a lucrative opportunity upon realizing the potential danger it posed.

However, Kevin's past insecurities resurfaced during his mutations, causing emotional turmoil and strained relationships. As Ultimate Kevin, he nearly destroyed his friendships with Ben and Gwen, reverting to self-deprecating labels and expressing jealousy towards Ben's heroic status.

While valuing innocent life, Kevin remained willing to kill when necessary, particularly to protect his loved ones. He advocated for lethal solutions against dangerous threats.

Kevin was prone to occasional blunders, revealing sensitive information or making tactless remarks.

Despite a lack of formal education, Kevin possessed significant street smarts, mechanical expertise, and knowledge of galactic affairs. He was adept at repairing and modifying vehicles, showcasing his engineering skills by creating advanced technology.

== Skills and Abilities ==

• Osmosian Abilities: Able to absorb and manipulate energy and matter.
• Mechanical Expertise: Highly skilled in automotive engineering and repairs.
• Street Smarts: Knowledgeable about the world and galactic affairs.
• Combat Skills: Experienced in hand-to-hand combat and weapons usage.

== Trivia ==

• Kevin's Osmosian abilities changed in Alien Force, allowing him to absorb material properties instead of just energy.
• He became obsessed with cars, constantly upgrading them with alien tech, showing his mechanical skills.
• His relationship with Gwen drove his moral growth and showed his capacity for love.
• His once explosive temper was greatly reduced, showing a large amount of personal growth.
• He transitioned from a loner to a trusted team member, proving his ability to work with others.