Ben Tennyson and Kai Green

Ben Tennyson and Kai Green are one of the main couples in the Ben 10 franchise. At first, only Ben had a crush on Kai as opposed to Kai who only liked his alien forms. However, over time they developed feelings for each other.
==History==
===Ben 10===
They first met in Benwolf, Ben was smitten when he saw Kai performing a spiritual dance. Ben made attempts to impress her. However, at the end of the episode, when Ben tried to establish a relationship with her, she told him that she only admired him as Benwolf, where she could "train" and "tame" him, much to Gwen's annoyance and breaking Ben's heart.
In Perfect Day, Ben was in a dream created by the Forever Knights' machine. After Ben repaired a bus wheel using Diamondhead, Kai appeared on the bus as a cheerleader for a few seconds. Ben looked shocked and surprised to see her and showed a little interest in her, proving that he still had feelings for Kai. Gwen in the dream reminded Ben that Kai broke his heart after they defeated the Werewolf in the desert.
===Omniverse===
In An American Benwolf in London, Kai's grandfather was taken away by the Forever Knights. She escaped and contacted Ben for help. Throughout their adventure to find her grandfather and the legendary sword Excalibur (of which Kai was proven later to be the only one worthy to wield it when she moved it), Ben and Kai exchanged some banter. At the end of the episode, Kai kissed Ben on the cheek, much to his surprise.
In Fight at the Museum, Spanner revealed that he had come from a future where Kai and Ben are married. Due to his bluntness and immaturity, Ben aggravated Kai increasingly throughout the VIP tour, worrying Spanner. However, when Kai initially believed it was Ben who saved the Orb of Pumapunku, she embraced him without hesitation. Later, Spanner purposely locked Ben and Kai in a room together in the hopes of having them bond, but to no avail. After the orb was stolen, Ben was saddened to see Kai cry and tried to comfort her.
In The Secret of Dos Santos, Kai developed a love-hate relationship with Ben due to his antics and arrogance, particularly finding his nickname "the future Mrs. Tennyson" annoying. She kissed XLR8 as her thanks when he revealed the location of the temple. When Ben collapsed and Kai caught him, Ben called her "sweetie". Due to being exhausted and injured from his fight with Exo-Skull, she also aided Ben all the way to his Time Cycle and asked if he was all right enough to ride home.
In The Most Dangerous Game Show, Kai, along with other girls Ben had encountered in his life, was selected by Charles Zenith to participate in his show, where the girls would try to win Ben's hand in marriage. When the final round commenced, she had no ride and so to help her, Ben called forth his Time Cycle. Kai commented on this and leaned over him. Later, Ben chose Kai over Ester to be the winner of the show. After Ester told Ben that she did not want to fight destiny, Ben tripped onto Kai, resulting in an accidental kiss between them. Despite this, the two blushingly smiled at each other, instead of being upset, finally coming to terms with their feelings towards each other.
==Trivia==
*Derrick J. Wyatt personally believed that Kai is the one who Ben ends up marrying and having kids with, even though that is not happening yet, because their relationship is more fun to watch than Ben's previous relationship with Julie.
*This relationship was a concept from the Original Series conceived by Thomas Perkins, who had always intended for a future version of Kai to be Ben 10,000's wife and Ken's mother. While the idea was not scripted at the time, it would eventually be resurrected for Omniverse.
**Thomas came up with the concept because, during the Original Series, Kai was the only real crush Ben had as far as he can recall.
==References==
===Crew Statements===
====Derrick J. Wyatt====
====Thomas Perkins====
Category:Characters' Relationships