Manning is a major character in Alien: Sea of Sorrows and is a very antagonistic person. He is described by Alan Decker as a "shaved gorilla and heavily tanned". Manning is an older man with salt and pepper dark hair, he is hired by Andrea Rollins to kidnap Alan Decker to be used to aid his team in capturing a Xenomorph, the mission succeeds but with numerous casualties and two incapacitated by Facehuggers which along with a live adult Xenomorph, are given to Weyland-Yutani
Manning's personality is that of a bully, using his size to intimidate people and using brute force when it doesn't work. While holding some degree of care towards his crew-members, he is quick to follow Andrea Rollins' orders even when it endangers his comrades or even at the cost of them such as Elway and Adams though he does ask Rollings to help them. While amoral, he is himself is disturbed by the lengths Rollins will go to get what she wants.