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Ben 10 First meeting: Unknown Devlin is Ben's future son Ken's son. He liberated his father but later betrayed him. |
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Kevin 11 First meeting: Unknown A lone 11 year old boy who Ben tried to befriend but who ended up being his enemy |
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Lucky Girl First meeting: Unknown Cousin to Ben Tennyson at first she serves as nothing more than a nagging cousin but then later finds she has a magical aura. |
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Maxwell Tennyson First meeting: Unknown Max Tennyson is the grandfather of Lucky girl (Gwen) and Ben 10. It is later revealed he was once part of an alien fighting organization known as "The Plumbers". |
