Fisher is also of average age for the pride and has been thoroughly taken under Pip's wing. Mess with Fisher and Pip will hunt you down. Fisher doesn't mind, and loves joking with Beans and generally goofing around with the others.
Fisher's past is kind of messy, but the pride has chosen to move on while respecting what has happened. Freddie first met Fisher before the pride had formed. In fact, it was Fisher's connections to Beans, Freddie, and Pip - along with Freddie's connections to Sprout and Mako - that formed the pride.