It is a person who abandons their duty or post.
the
Geronimo
An abandoning is an act in which someone or something has been abandoned or neglected.
Lucky.
An editor.
you may be able to call this person a blackmail victim.
Eponym
tube
*what would i call a person who easily gets offended and does something back? i would call that a person who's overreacting.*I would call that person touchy and vengeful.
A name is for someone to call you something. Would you want someone to call you something or say,"Hey........um.....you person over there!"
One possible answer could be a procrasintator - a person who always puts off what they need to do.