Being an Exceed, Lector's appearance is that of a small, mildly anthropomorphous cat standing on his rear legs, with his two front legs acting as hands of sort. His fur seems to be dark brown in color, with most of his body being red, but his face, belly, paws and the end of his long tail being pink. He has large, pointed ears, and prominent tufts of dark fur jutting outwards in correspondence to his cheekbones, where his whiskers are.
Lector doesn't don a complete outfit, instead sporting just a blue, sleeveless button-up vest which is left open, and has three dark round buttons on its right side.
Lector is a highly arrogant and sarcastic cat. He has a habit of belittling others, considering everyone to be beneath Sting, and, in general, beneath the Sabertooth guild as a whole. During the Grand Magic Games, he constantly states that Sabertooth members will easily win their matches, even berating Frosch for simply asking who would win. When things don't go as he foresees, Lector is left in a stunned state, best seen when Yukino Agria was easily defeated by Kagura Mikazuchi and when Sting simply quit the race he was in.
Upon seeing Sting and Rogue, the two Dragon Slayers Lector constantly praised for being true Dragon Slayers, being single-handedly defeated by Natsu with relative ease, Lector was left speechless and distraught. However, it appears that Sting's loss has humbled Lector, having told Jiemma that even though Sting lost, he learned more from his fight in defeat rather than in victory, seemingly changing his arrogant ways.
Aera: As he is a member of the Exceed race, Lector is capable of sprouting angelic wings as a means of flight.