Some humans in Bob the Builder were mentioned but have not been seen.
Billy is Bob and Tom's grandfather. The only thing Bob has left off him is his tool box. He was a builder like Bob and Robert. He is most likely deceased because Bob talked about him and kept his tool box. In culture, people would sometimes keep something to remember a deceased family member.
- He seems to be the first character mentioned to be deceased.
Dora is Bob's aunt.
Mavis is a women who works at the post office.