Gwen Tennyson

Gwen Tennyson (full name Gwendolyn Tennyson) is the cousin of Ben Tennyson. She is the second member of the Protectors of Earth to be introduced, after Ben. The younger version of Gwen is portrayed by Veronika Bonell, while the adult version of Gwen is portrayed by Emma Stone.

Personality
Gwen will be keeping some of her major personality traits, such as being the brains of her and Ben, being more mature than Ben, and being the voice of reason when the team is comprised of herself, Ben, and Kevin Levin. How her personality will grow beyond that is currently unknown.

Appearances
Gwen is so far confirmed to appear in ten of the Cartoonverse films as a major character, being confirmed to be in three of the four Ben 10 movies (she has not yet been confirmed for Ben 10: Omniverse), having her own spin-off trilogy, and being in all four Protectors of Earth movies.
 * Ben 10
 * Protectors of Earth
 * Ben 10: Alien Force
 * Ben 10: Ultimate Alien
 * Protectors of Earth: The Negative Ten
 * Lucky Girl
 * Protectors of Earth: The Crystal Gems
 * Lucky Girl 2
 * Gwendolyn
 * Protectors of Earth: Diagon's Reign

Powers
In the original franchise, Gwen was confirmed to have magical powers due to alien descent from her grandmother Verdona, who was an Anodite. However, this has been removed for the Cartoonverse, and she is purely human with the ability to manipulate magic and mana.

Gwen can create energy blasts, shields and barriers. Her powers are mainly used like energy constructs, allowing her to make many different types of structures like, hammers, protective helmets, battering rams, beams to grab and throw enemies, stepping stones/platforms to carry her and others though air, safety nets; it also turns out Gwen can also synchronize her martial arts styles with her energy manipulation abilities.

Gwen has more mana-related powers: She can find any person she wants by detecting the traces of mana that he/she left. She can also absorb mana.

She also has the abilities of telekinesis, teleportation, heat vision, telepathy and healing living beings. Her ability to transform into an Anodite no longer exists due to them not existing in the Cartoonverse, but it is currently unknown if another power will take its place.

Weaknesses
Gwen's magical abilities are not accessible or mastered by nature, and must learn how to use them.

Ben 10
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Protectors of Earth
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Ben 10: Alien Force
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Ben 10: Ultimate Alien
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Protectors of Earth: The Negative Ten
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Lucky Girl
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Protectors of Earth: The Crystal Gems
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Lucky Girl 2
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Gwendolyn
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Protectors of Earth: Diagon's Reign
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Trivia

 * From what is so far confirmed, Gwen is the character that appears in the most movies, at ten, beating Ben by two.