A person who abandons something can be referred to as an "abandoner" or "deserter." In specific contexts, such as a relationship or responsibility, they might also be called a "renegade" or "defector." The term can vary based on the situation and what specifically is being abandoned.
It is a person who abandons their duty or post.
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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.
*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.
Eponym
tube
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.