Robert "Bob" Jr., known to his friends as Bob the Builder, is the main protagonist, titular character and a General Contractor with being head of his own construction yard along with his close colleague Wendy. He is based in Bobsville, Sunflower Valley or Fixham Harbour depending on the series.
Bob is from a family of builders - his father Robert is also a builder and so was his Grandfather Billy. Bob wanted to be a builder ever since he was a child. He got a hardhat for Christmas when he was young. The first thing he fixed was Tom’s toy elephant. When he was a teenager, him and his twin brother Tom went out camping in Sunflower Valley. He is assisted by Wendy and a host of five anthropomorphic vehicles in various projects in and around town. In the early episodes he was not good with computers but in newer episodes he used them for construction work designing. Some of the problems in the show arise from Bob's habit of forgetting to turn his mobile phone on. He also is the owner of Pilchard the Cat.
Bob is a very kind-hearted, caring, and hard-working man who enjoys his work and encourages everyone else. He is shown to be a fun-loving and intelligent individual. During a crisis/problem, he is not one to lose focus and often comes up with ideas on how to fix things.
He acts as a parental figure to his machines and makes sure to keep them in line. While he is honest and frank about how he feels, Bob is far from being strict or stern. Rather, he is shown to be quick to forgive, but also willing to teach and correct.
He has displayed romantic affection for Wendy.
He's very close to his twin brother Tom, and they have been close since they were kids.
He can at sometimes be forgetful when he tries to remember what jobs to do. Thus, Wendy is there to help his mind Kickstart.
Working the office and computer electronics, that also needs Wendy.
Bob is a tan-fair skinned male with small black eyes and a medium sized nose. As a construction worker, he is often shown to be wearing his building clothing which consists of a red and orange patch shirt, faded blue overalls, brown shoes, and a yellow construction worker's hat. Around his waist, Bob also carries a tan colored tool-belt.
When his hat is removed, he is revealed to have brown hair. His hair was longer during his youth.
Bob is the only character to appear in every episode.
In a production wrap party poster from 1999, it shows that Bob's hardhat is able to swivel on top of his head.
Another thing worth noting is it was possibly the first public appearance of Bob before S1 aired in the UK. Another is that this is the first "crude" showing of Bob. In the poster, he is seen having a cigarette in his mouth and lying on the floor behind a wall (possibly Bob's Yard) next to Farmer Pickles who is either vomiting or urinating. There are also 4 glass bottles in front of them.
He saved Roley's life in Runaway Roley by using barriers to make a bridge like a brave true hero.
He tends to usually be seen smiling in the stop motion series, even if the scene doesn't really make sense to have him smiling. In Ready, Steady, Build! he is more expressive, and tends to frown at times where it makes sense.
The first thing Bob ever fixed was his brother Tom's toy elephant.
In the 'Official Children in Need Medley' music video, Bob is the first cartoon character to be seen singing at a recording studio. The only line in the medley that Bob sung on his own was "If you look around, The whole world's coming together now" when it was on its first part. ('Can You Feel It') That line in the medley was also from the 'Can You Feel It' song itself.