Irreplaceable

Do your best, but not too much. The last thing you want is to become Irreplaceable.

— parents' caution to a child upon conscription

To be labeled Irreplaceable in the Confederation is to be given a badge of the highest honor and the deepest pain.

Causes

Not everyone can be replaced. Sometimes an individual proves so talented or innovative that attempting to assign someone else to fulfill their tasks is a recipe for failure. The availability of this talent becomes necessary for success, and in the Sparnell Armed Forces? Nothing is more important than success.
Those identified as a linchpin are labeled as Irreplaceable, and this is where their troubles start.

Prognosis

Those labeled Irreplaceable by the Sparnell Confederation are barred from the Afterlife, forced to remain on the mortal plane. Upon death their souls return to the Soul Vault deep beneath SAF Military Headquarters, ready for binding or resurrection.
The Irreplaceable have little say in the matter, some compelled by magical means, others through coercion or threats against loved ones, each method customized to ensure the maximum compliance of the Irreplaceable individual.

Prevention

The easiest way to avoid being labeled Irreplaceable is to avoid catching the attention of Sparnell Fleet Command. Given the constant drive to seek glory and prestige for self and Family, this is unfortunately easier said than done for those possessing sheer talent.
Other options include seeking sponsorship from one of the few Admirals who have not yet exercised the opportunity to declare a subordinate Irreplaceable, in the hope this is due to more than simply not recruiting an underling worthy of the label. Prior to his disappearance, Admiral Kydell had proven himself a popular choice in certain circles due to public comments he had made against the practice. Others recommended avoiding his service if possible, as while he had never invoked his capabilities to declare an Irreplaceable he also had a suspiciously high record of re-enlisted talent.

No. You don't understand. But how could you? You haven't watched generations of those you love grow and change and pass on into the next life, knowing you'll spend an eternity the same as you are today, just as you were an eternity ago.
No. It's not an honor. It's a curse.

— an Irreplaceable