Bill Grey is the quintessential guard dog. Data for Bill existed in the scrapped Star Fox 2 game for the SNES, but he didn’t make a proper debut until Star Fox 64. He’s one of Fox McCloud’s oldest friends, with the two having grown up and attended pilot school together.
In 64, Bill takes charge of Corneria’s defensive squadrons, aptly called the Husky and Bulldog squads because duh. He also makes an appearance in the often-overlooked Star Fox Command, also on a defensive mission with Falco, and then he returns yet again to defend Katina once more in the ill-fated Star Fox Zero.
No matter what he does, Bill is always looking to protect the things that mean the most to him.
He might not be as visible in the series as General Pepper, but he’s certainly got something Pepper doesn’t. Where the General barks orders and maintains a definite distance from the rest of the squad, Bill is right there in the space-trenches alongside everyone else, sharing their burdens as one of the team.
Unfortunately, Bill still manages to be the one left out of the big picture. He gets no special ending in Command and doesn’t have as much chance for character development as a certain frog, falcon, and donkey.
While we hope, one day, Bill gets some more attention, maybe even part of a full-blown adventure like Star Fox Adventures, he serves as a good reminder to give credit where it's due to all the goodest watchdogs in our lives.