Boris is a member of Caillou's family. His last name 'Anderson' comes from Issac Anderson (the main jumpstarter of Caillou Gets Grounded) and this name is now widely accepted, however, the name can vary in some different users such as Boris Perkyshitz (Perkyshitz Family) and Boris Green. (BrentAnimate) He is the spouse of Ms. Martin/Doris (In some series he is Ms. Martin's husband.) and the Father of Caillou and Rosie. He is also the father of Daillou, Cody, Daisy, and more characters in some series.
Personality (Caillou Gets Ungrounded)
Boris is the deuteragonist of CGUG. In most cases of Caillou Gets Ungrounded, Boris is a nice, caring, and loving father of Caillou, and dislikes/grounds Rosie. However in some Users series, Boris also likes Rosie. (Such as Tbone Animate's series and SBSP&DTERE2004's series) Boris' personality is quite bland in this series.
- Red Boris/Boris The Teeth Guy: A racist, foulmouthed, angry criminal who usually yells a lot and has a giant mouth. (Made by Julian3535)
- Green Boris: An annoying, upbeat, green version of Red Boris who is nice and is always happy. He has a widely accepted catchphrase "I'm a bun, I'm a bun, I'm a tasty tasty bun!" Note: This catchphrase is a reference to a clip in Season 4 Episode 31 of The Amazing World of Gumball, that can be found here. (Made by David the goanimator)
- Nice Boris: Nice Boris is a nice version of Boris who wears a Teal hoodie instead of Boris' usual Dark Green hoodie. He always is nice to everyone and is upbeat. He is similar to Green Boris' personality, but he is not loud or annoying. (Made by: Unknown)
- Funny Boris: Funny Boris is a 'Funny' version of Boris who always makes stupid jokes that everyone ignores. He wears a Lime Green hoodie, unlike the usual Dark Green hoodie worn by Boris. (Made by: LukeAnimate)
- Masculinist Boris: Masculinist Boris is a Sexist version of Boris who is degrading to women. (despite Boris already being like that in some series) He wears a Vermillion (Neon Red) Hoodie, unlike the usual Dark Green hoodie worn by Boris. (Made by: LukeAnimate)
- SolitareJoker's Boris once went on a rant about how many people got his hair wrong.
- BrentAnimate's Boris has a demon clone named "Coris" (Daillou's dad)
- Boris likes to smoke weed and do drugs in Cewyah's series.
- He gives Doris a Gilgon on the daily
- Some people hate Boris and the Caillou Gets Grounded series because they take it too seriously.
- AndersonsAndSpongebob ViolyBorisKenAndClydeNo's Boris always gets grounded for getting a black card in behavior card day or doing naughty stuff like Stealing Fireworks on Independence day.
- Boris is most infamously known for committing a series of mass murders in GoCity back in 1992. First, he aimed a missile at a government building, killing 168 people (including 19 kids) as a result. Two days later, he snuck into his old elementary school and killed 28 more kids. But thanks to the overused excuse known as GoAnimate logic, nobody actually died and magically came back to life in the next episode.
- SpongeBob SquarePants and Dora The Explorer Rule Est 2004: He is the deuteragonist of her Evil Caillou Gets Grounded series, her Rosie Gets Ungrounded series, and her Caillou Gets Ungrounded series. And a protagonist in normal Caillou videos. In her Evil Caillou Gets Grounded series, He, Caillou, Rosie, Doris, and Classic Caillou team up to ground Evil Caillou. In her Rosie Gets Ungrounded series, He teams up with Doris and Caillou to unground Rosie. and In her Caillou Gets Ungrounded series, He teams up with Doris and Rosie to unground Caillou. Unlike the other GoAnimate Caillou videos, He never gives Caillou or Rosie any punishment or Ground them in her videos. He, along with other Caillou characters beside Caillou, doesn't appear in CPHP videos (For more info, see here)
- MLGBoris2011: He works at Boris Network and gets licky by Randy Penguin. He likes girl games like Barbie Dreamhouse Adventures, Buddypoke, Gachaverse and more. He looks 100% accurate.