Ben 10 Fan Fiction Wiki
Ben 10 Fan Fiction Wiki

Kai is one of the main protagonists in the series Kai 20: Aliens In Danger.

OV KaiV3.png
General Information
Species Human
Home World Earth
Age 11 (flashback; Ben, We Have A Problem.)
14 (currently)
Occupation(s) Hero
Powers and abilities
Equipment Alfatrix
Aliases Kai 20
Voice of Reason and Justice (inside Celestium)
Alternate Counterparts Kai 200
Saru (technically)
First Appearance A New Hero Is Born!


Kai normally wears a jacket (similar to Ben's, but with blue stripes). He has brown hair and eyes. Under the jacket, he wears a dark grey/white shirt with two red squares. He also wears the Alfatrix on his wrist.


Kai is cocky and sometimes arrogant but also brave. When it comes to saving the world, he is always willing to help.


Kai was a normal student who one day went on a field trip with his class. At the time, aliens and humans were starting to live together, so the field trip was on Galvan Prime. In the middle of the field trip, Kai heard a noise and decided to investigate. He found a hurt Galvan who gave him the Alfatrix (Azmuth's latest invention) so he could protect Galvan Prime and later the world.


  • Kai doesn't know exactly why he names his aliens. He thinks it's because "It pushes his imagination".
  • Credits to Waybig101 for making the UAF styled version of Kai.
  • Kai's parents are divorced. His mom lives on a city and his dad on a farm.
  • His shirt design (see infobox) is based on Rex Salazar's shirt from Generator Rex.