B

B is the second letter and additional party member Gregg comes across. He is the brother of P. He is encountered directly after beating the Thieferino on the roof of Knotyore Town's mansion.

Fate
If the world is destroyed in Take a Fucking Bath 2, J, along with the rest of the world, will be phased out of existence.

Gregg
As with all of the other letters, P becomes loyal to Gregg despite making questionable remarks towards him sometimes.

P
P is B's brother. The two were separated at an unknown point.

J
B and J were best friends in high school. B is ecstatic to reunite with him in the Great Ice Maze.

Unused/Scrapped Content

 * Originally, B, along with P and J, was going to sacrifice himself and merge with the other two letters to perform a Peanut Butter and Jelly sandwich (hence P, B & J) in the battle against the Valve. This is where Telltale's Game of Thrones' song Two Brothers was going to play, and why it appears in the credits and game files.