Peter

Peter is one of the main characters in the Secret Seven Book series and is a member and leader of the Secret Seven society. He lives with his mother,father and sister Janet, who is also a member. Peter's father is one of the main helpers for the society as he handles what is beyond the power of secret seven and mostly handles the case to the kind faced inspector. Peter has a golden spaniel, which is named Scamper, who is often considered as a real member of society. As per the book "Well Done Secret Seven", he also has a pet cat.

Personalty
Although intelligent, responsible and tenacious, he is easily slighted and angered. A strong and capable leader, he has a bossy streak, verging on being downright unreasonable (particularly about wearing badges and remembering the password), reducing Pam and Barbara to tears, and on one occasion, causing Jack to temporarily leave the group. Peter personally hates Jack's awful sister, Susie, who is always up to create disturbance to the society.

In the book Well Done Secret Seven, on Pam's suggestion to carve SS for Secret Seven on their tree which was chosen to be the tree on which their treehouse will be built in Windy Woods, Peter says that they cant as his father says that scribbling on walls and pavements and scribbling on trees is only done by idiots, and if anyone wants to be an idiot he can jolly well get out, that made Pam quite hurt.

He, Janet and Jack are often closer with each other than other members of the group. Peter sometimes teases his sister, but acknowledges her as a good member of the Society.