Raiden

raiden is an immortal shinobi who has lived many years, but doesn't age much, he constantly wears a mask and has never been seen without it. he first appeared in dead end as one of the first main villains in the story line, he was predicted to be killed but was later revealed to be alive and can never die. in 3rd world crisis, raiden plays an important part, he is a member of kizu and has a new appearence, his mask is like the front of a black skull without the jaw, showing his mouth and chin, he now wears a hood most of the time and is later revealed to be an akatsuki spy as both him and tobi are apparently immortals, but raiden can never die, tobi just lives for a long time.

history
raiden has lived too long and wants too die, but he can't, part of the reason why he wants to die is because he has made bad choices during his eternal life.

when raiden was young, all he ever wanted was to protect his loved ones, but he soon realised that was immposible and decided to live a never ending life of crime, he would start of by commiting small crimes and eventualy getting to big crimes like mass murder and village destruction.

at some unknown point in time, tobi and raiden talked and decided to join forces, but raiden said that it was too early for that and left. the two discused a few different topics, who each of them are (tobi revealed his face to raiden), kizu and akatsuki, how they are both immortal in different ways, tobi can live for a long time while raiden can't die, this discution later lead to raidens betrayal of kizu and him joining forces with akatsuki.

creation and development
while i was creating characters for kizu, i thought of a man with a mask and evil personality, then i realised that he resembled death, so i made him immortal. later on, i remade dead end and was trying to find a good main villain for the first mission out side of the hidden leaf village, so i thought it might be a good idea to have raiden there as he is immortal and would be 'killed' ''but later revealed to still be alive and immortal, i used this as an introduction for raiden and used his time in 3rd world crisis as the main story for him.