Patrick Yang, commonly called Pack or the Pack, is a supporting character in the anime Comet Lucifer. He is a teenage boy with blonde hair cut to neck length and red eyes, and he first appears in the second episode of the series.

His background is tied to the Gift Administration, the military and governing body of the world where the story takes place, where he served as a soldier. At some point before the events of the series, he became a prisoner of the army. The reason for his imprisonment is not revealed, but he was viewed as extremely dangerous, and his guards held orders to shoot him on sight if he ever attempted to escape.

In terms of personality, Patrick is rough-spoken and quick to anger, and he displays a ruthless streak that leads him to disregard any means or methods when working toward his own ends. He possesses quite high physical abilities, which match his aggressive and forceful nature. His most defining trait is his sincere and almost worshipful devotion to a character named Gas, sometimes rendered Gus, who gives him his nickname. This devotion strongly shapes his conduct and places him firmly on Gas's side of the events in the story.

His role in the narrative is that of a loyal and dangerous supporting figure, using his physical prowess and willingness to do whatever is necessary to serve his aims and those he follows. Notable abilities attributed to him are primarily his physical strength and combat capability, which, combined with his merciless attitude, make him a formidable presence in the situations he becomes involved in.