Brad Lemon, not much is known about him. He first started out as a hired gun for Metal's  monster hunting crew.

He disbanded when the pay wasn't satisfying him, Brad also carries a multitool just like Nial's. Brad wears black and yellow which is how he got his nickname Lemon Man.

When he arrived to Atlantis he was hired be Tristan to protect the captain's younger brother and his family.

Brad is also a walking arsenal, he has so many weapons covering his body you can barely tell what he looks like.

Another way to tell that it's him is that he has a metal bottom jaw and Metal top teeth because of a tragic accident that he doesn't talk about.

Brad has fought in many wars most of them he was paid to sabotage both sides which he wasn't happy about.

Brad's hair color is silver (formerly brown) with yellow dyed tips. He was neglected as a child and apparently has more training then Tristan.