Kai Green

> "*The mystery of this temple has got nothing on the mystery of Kai Green.*"
> ― Ben Tennyson's thoughts on Kai after she kissed him.
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> "*Your relationship is very special. It benefits both of you by being together. You work very well together on the missions we go on together*"
> ― Jordan's comments on him working with Ben and Kai during one of their missions.
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**Kai Green** is a Navajo girl who is one of Ben's first love interests. Kai is the granddaughter of Wes Green, a friend and former partner of Max Tennyson. She is also currently Ben's girlfriend.

## Appearance

### Regular Appearances

In the original series, Kai had long, black hair and brown eyes. She wore a red shirt, green shorts, brown boots with white socks. She had silver bracelets and a blue ring.

In **Omniverse**, Kai has grown noticeably taller. She is slender yet athletic in build. She wears a short-sleeved red T-shirt with a red and peach colored sweater. She still has brown boots (now with blue stripes) and her shorts are even shorter now. Her hair is in a high ponytail and she also has a tan earring. She wears brown gloves, tan socks, and a belt.

### Occasional Appearances

At the beginning of *Benwolf*, she wore a knee-length blue dress with red stripes as well as red shoes with white socks.

In *An American Benwolf in London*, Kai lost her sweater in battle and is seen without it for most of the episode. In *The Secret of Dos Santos* and most parts of *The Most Dangerous Game Show*, she again did not wear her sweater.

## Personality

She is a dedicated girl who likes to preserve and value her grandfather's lifetime work and is even attached to his cult objects. She gets very upset if she loses one.

She is very smart and creative, as she showed in her adventures with Ben and Rook.

Despite of her seriousness, she still doesn't miss a chance to tease Ben and make fun of him, hiding her crush for him.

She works hard to fulfill her objectives and doesn't give up even in the most radical situations.

She can also express her deepest feelings when she is very happy, like when she kissed Ben twice after he helped her, despite saying that she doesn't have feelings for him.

She enjoyed Ben's clothing change to somewhat match her. By wearing black gloves with green wrists and khaki chino shorts that go above the knee.

As time went on with their adventures with Jordan, Her feelings for Ben grew very much.

## History

### Ben 10

She first appeared doing a spiritual Native American dance in the episode *Benwolf*. She was Ben's second crush, but she only took interest in him after he started becoming Blitzwolfer because she wanted to, as quoted, "train and tame him". When she admitted to this, Gwen gave her a stern talking to.

Kai made a cameo appearance in Ben's dream world in *Perfect Day*, where Diamondhead saves her and a group of cheerleaders from SixSix and Vulkanus.

### Omniverse

Kai appeared in *An American Benwolf in London*. Working with her grandfather, they find the secret laboratory of Dr. Jekyll, but are quickly afterwards ambushed by the Forever Knights in their search for Dr. Jekyll's Hyde Formula. While they capture Wes, Kai manages to escape and contacts Ben and his partner Rook for help. Ultimately, they discover the hidden location of the legendary Excalibur.

When removing the blade from its stone seemingly proves impossible even with the Hyde Formula or Ben's strongest aliens, Forever King Chadwick orders his men to kill their enemies. As Ben battles the mutated Forever King, the cave's underground pipes were ruptured and caused a flooding. Convincing the Forever Knights to work together, everyone was able to escape alive.

In *Fight at the Museum*, Kai comes to Bellwood to host a new exhibit on alien artifacts at the Bellwood Historical Museum. Her decision to invite Ben paid off when an alien thief named Subdora tries to steal one of the artifacts, one of the first that Kai found with her grandfather. Fortunately Ben's, Rook's, Ester's and Spanner's efforts foil Subdora's efforts.

Knowing that Subdora will be back, the four team up and stay overnight with Kai, Spanner being forced to reveal that he comes from a future where Kai and Ben have been married. Thanks to Spanner's efforts Kai and Ben are locked in a room together where the two, despite their best efforts, bond. Later after Subdora's partner Exo-Skull comes in and tears through the museum and takes the "Key to time itself" from the artifact. Spanner takes the artifact itself, leading Kai to believe she has lost one of the most important things in her life.

In the *The Secret of Dos Santos*, Kai calls Ben to South America to help her track down The Temple of the Sky, an ancient temple with distinct alien origins. Kai soon develops a love-hate relationship with Ben and his antics, particularly his nicknaming her "the future Mrs. Tennyson," simultaneously annoying and helping her locate and get into the temple. Arriving at the temple's treasure Temple Kai encounters a Galvan named Ujin.

Dennis comes in and explains that the artifact the group has found is the final component of a villain named Maltruant, a rouge Chronosapien obsessed with taking over all of time and space. Exo-Skull tears into the room and, with Subdora and Maltruant's help, escape. After disgusting Kai with his remark about how they're going to get married in the future, Ben left Dos Santos in his Time Cycle.

In *The Most Dangerous Game Show*, Kai is one of several contestants chosen to compete in "The Most Delicious Game" for the chance to marry Ben. She is the ultimate winner, and joins Ben on a mission to free the losers, who have been trapped in the Null Void. After Charles Zenith is defeated, Ben slips on a banana peel and falls towards Kai, and the two accidentally kiss.

After Tel Aviv Toad, Jordan got Ben and Kai an apartment to live. Both of them move into the apartment, and their relationship deepens even more. Subdora attacks the apartment, but Kai freezes time around them. She gets angry at frozen Subdora for ruining the day, so she fires a time ray which banishes her to another timeline. She unfreezes time, and Ben asks her what happened. She says that she froze time, and that she sent Subdora to another timeline because she was angry at her for ruining the day. Jordan says that he will train her with Ben's assistance.

## Powers and Abilities

* **Chronokinesis-** Kai has the ability to manipulate the movement of time, such as slowing it down to the point where it seems to stand still. Kai can also take herself and others outside of time.
	+ **Chronopathy-**Kai possesses chronopathy, which grants her a fine-tuned sense of precise time and determines the exact time an event has taken or will take place and for how long.
	+ **Chronoportation-** Kai has the ability to travel through time and space by using portals.
	+ **Time Acceleration Rays-** Kai can fire off a ray that rapidly accelerates anything it touches into dust.
	+ **Time Travel-** Kai has the ability to travel through time.
	+ **Dimension Travel-** Kai can travel through alternate timelines and alternate dimensions.
	+ **Time Portal Creation-**Kai can open rifts in time that can lead to any time in any dimension.
	+ **Tracking Skills-**Kai has considerable tracking skills taught to her by her grandfather.
	+ **Skilled Hand-to-Hand Combatant-**Kai has been taking Judo lessons, showing considerable skill against trained soldiers of the Forever Knights.
	+ **Chrono Energy Consumption-** Kai is able to consume Chrono Energy.
* **Oxygen Independence-** Because Kai Green feeds on Chrono Energy, she does not need oxygen which is why she can breathe underwater and in space.
	+ **Space Survivability-** She can be in space because she does not need oxygen anymore due to the Chrono Energy.
	+ **Underwater Breathing -** Kai can breathe underwater because she does not need oxygen anymore. She now feeds on Chrono Energy. It is somewhat like photosynthesis.

## Appearances

### Omniverse

#### Season 5

* *An American Benwolf in London* (first reappearance)

#### Season 8

* *The Secret of Dos Santos*
* *The Most Dangerous Game Show*

## Trivia

* In *An American Benwolf in London*, Kai is able to slightly move the sword Excalibur from its stone, having grabbed on it to prevent herself from drowning.
	+ Her future self is seen wielding Excalibur in *The End of an Era*.
* Blitzwolfer is Kai's favorite out of all of Ben's aliens. She also thinks that Pesky Dust is cute.
* While originally only interested in Ben's Blitzwolfer form, she has since shown signs of growing feelings for Ben as himself, becoming bashful when people imply they are a couple. She also on impulse kissed XLR8 on the lips during *The Secret of Dos Santos* as thanks for showing her the way to the Temple of the Sky.
* She gained her time powers by being around Clockbot, and she also gained her oxygen independence by being around Clockbot. It is because of her Chrono Energy consumption that she does not need oxygen anymore.

1. ↑ *The Secret of Dos Santos*
2. ↑ *An American Benwolf in London*
3. ↑ *The Most Dangerous Game Show*