My character would probably join a mental asylum and just wilt away there
Movie career, babes booze babes err beer uhh more babes and uhh bourbon oh did i mention babes?
Anders Thomassen, or just Andy.
If he dies he dies fighting xenos in the hive having broken out of his nest and realized he still has his smartgun. He keeps fighting until he pops hi last nade and fights with a drone to get closer to the nade before it blows to ensure death.
If he survives, he leaves the corps (if possible) and returns to Nova Stralia and tells his story to those who would listen probably becoming an author taking creative licence on the tragedy of the Almeyer and it's crew. He would maybe marry and have children but his past will haunt him right up to a xeno attack on his homeworld where he makes his final duel with the aliens.