Kwang-Sun Williams (born July 11, 2015 in Seoul, South Korea) is one of the adopted sons of Bryce and Petunia Williams and the fraternal twin brother of Ji-min Williams.
- 13th Birthday ~ went to Red Robin for dinner
He has black hair and brown eyes
- Father: Bryce Williams (1984-)
- Mother: Petunia Williams (née: Cooper) (1992-)
- Brothers: Yoshi Williams (2011-), Hugo Williams (2012-), Akim Williams (2014-), Matt Williams (2017-), John Williams (2024-), Jett Williams (2024-)
- Sisters: Satoko Williams (2011-), Ling Williams (2013-), Kim Williams (2015-), Ji-min Williams (2015-), Lucy Williams (2016-), Ania Williams (2018-), Coco Williams (2019-), Josephine Williams (2024-), Lina Williams (2032-)
- Nephew: Toshio Williams (2029-)
- Aunts: Mandy Cooper-Aoun (1989-), Frankie Cooper-Kummer (1991-), Vicky Cooper-Lanza (1985-), Dana Shultz-Williams ( -)
- Uncles: Clemont Anon ( -), Edward Kummer ( -), Cilen Lanza ( -), Grant Williams ( -)
- Cousins: D.J. Williams, Diana Cooper, Trey Cooper
- Grandmothers: Gabrielle Williams ( -), Sophie Cooper (née: Graham) ( -)
- Grandfathers: Clive Williams ( -), Ray Cooper ( -)
In Supernanny: The Theory AnimatedEdit
- He and Ji-min came home to the family after being adopted from South Korea when they were 3.
- For Halloween 2028, he was dressed up as The Joker from the movie The Dark Knight
- For Halloween 2035, he was dressed up as a Buccaneer Pirate
- In Christmas 2028, he opened his presents to reveal a South Park Season 1 DVD, a Family Guy Season 10 DVD, Twilight Woods for Men cologne. And in his stocking, he found a couple of ballpoint pens, some keychains, Noir Cologne and Dark Amber 2-in-1 Hair + Body Wash.
- In Christmas 2035, he opened his presents to reveal Paris Blue cologne. And in his stocking, he found Twilight Woods for Men deodorizing body spray.
- His favorite movie is The Dark Knight
- His favorite TV show is South Park
- His favorite color is cobalt blue
- His talents include ventriloquism, vocal comedy, jump roping and monologue
- His ice cream flavor is guava
- His favorite hobbies are cross-dressing, hiking, and fishing
- His favorite restaurant is Red Robin
- His favorite video game is Fable Anniversary
- He is made fun for being anorexic