Guenael Lee is a creation of Gremmy Thoumeaux's The Visionary ability, originally thought to be a member of the Wandenreich's Sternritter with the designation "V - Vanishing Point".

Guenael is a short, elderly-looking man who has big hair. His lips do not fully close, exposing large teeth. His legs appear to be disproportionately short to his torso. He wears glasses and has a lazy right eye. He wears a head adornment which is attached to four points on his face. His attire is a variation of the Sternritter's uniform, consisting of a hooded trench coat.

He likes to toy around with his victims through using his power, disappearing and reappearing from their sight while posing taunting questions. He has a habit of judging people based on their appearances, such as when he calls Yachiru Kusajishi a 'wild brute', and comments on the color of her hair and her overall features.

During Wandenreich's second invasion, when 4th Division Lieutenant Isane Kotetsu heals some of the wounded with the aid of 11th Division Lieutenant Yachiru Kusajishi, Guenael, invisible, asks Isane if she thought they would not be found. He asks Isane where she's looking as she is unable to locate where the voice came from and then appears behind her, seizing her. Laughing, he says he'll disappear again, but before he can do so he is punched by Yachiru. He however disappears at the moment she makes contact, confusing her. Proceeding to hit Yachiru, he laughs and reveals his epithet and power.

(Source: Bleach Wiki)