Following after prelude with my nephalem oc introduction:
I have idea au after supernatural s15 dean was new death after he was forced out heaven with dishonorable (after jack lose war to chuck who
20 years has passed nephalem daugher become adult and new student at stanfort with major antropology (she not full ride like sam tho she not smart like that) but 1 year before real story actually she was have bad fight with clereance (castiel) her father, he wish she was school at indonesia (place where castiel and meg escape) but his daugher was pure rebel by heart so in the end castiel permit ratna (my oc name ratnasari angreanni) to applied to stanfort but castiel insist ratna when holiday come she must comeback to indonesia every year (for daily grace reduction to pervent ratna to reach her nephalem potential and hide ratna from heaven and hell,this is without ratna consent nor she knew she was not human she was half angel-half demon),ratna angree with that.
1 year after ratna attend stanfort army of demon come to her night class and demon possesed one class full of 70 student and 2 proffesor then attack ratna (and kill their meatsuit in proses), ratna who mad accidentally reach her full potential (because she was panic and scared) and accidentally killed 72 demon with her power (god word/absolut command) that event make great demon and angel omen one time near stanfort.
After that she crying and passed out and awake in lucifer cage, alone and spent 1 week (or 9 years cage time) in there before she sucsses escape before some demon kill her.
2 days after the incident, lucifer with fake name william kline (who human, hunter and new proffesor who in his 14 day of work) still try to hardest to solve the case, and he suspect the culprit was chuck and maybe he gonna say goodye to his dream job . Then when night pass dean visit lucifer and lucifer gets scared because the death was dean and he think death wanna collect his soul but no dean help to solve the case meanwhile he begged lucifer to save his son ben and ratna.
Lucifer burrowed his eyebrow,he still remeber ratna trying cheating use enochian laguage few days before inccident but from 73 victim (and killed demon) ,ratna mysteriously dissapear.
Dean explain what he heard from demon, who the kill demon was ratna herself with her nephalem ability then demon catch her and throwing her at lucifer cage.
Lucifer confused because what supernatural being ratna is, then dean explain she was nephalem and castiel daugher.
Kelly kline who heard that at next room come to dean and help her out in one heartbeat, then lucifer agree to help.
Few days after they prepared to down hell ,kline couple execute the plans they make to freeing ratna (for 20yrs lucifer and kelly kline married via traditional wedding and angel bound so kelly strong meanwhile for excange lucifer never age)
At down there is so hard and every demon in standby mode, make their plan so hard even with few hexbags dean teach lucifer to make.
But turn out why hell in standby mode because ratna success to broke lucifer cage and try escape earlier so kelly try to tracking her, when they found it lucifer who is now mere human can see ratna raven wing and her wing was beautiful and big,lucifer and kelly shout her name but alas she run away and then some demon stab her with some gregori sword who was washed with holy oil and prince of hell blood and die.
Kelly kline too late and can't save her but dean can, he will find ratna in empty, and ask them to preserve her body and help them to comeback to surface.
Meanwhile he bring his son ben who now tainted with mark of cain and become knight of hell.
So for preserve ratna body kelly heal her minor and stab wound and save her in one her pocket dimention.
In empty dean found empty pissed because they can put ratna sleep and instead she create empty become her home with projection of her parent, dean feel pity and pick her up and he promise to bring ratna to her parent or her brother and sister (claire novak and jack kline) but ratna first must be comeback to her body.
Then she wake up and need few month ti healing and she under lucifer and kelly care. Then she become hunter to seek redemption althought she not kill her friend, but she still think she is despite kelly tell her is not her fault and she almost drop out but lucifer prevent her and tell her to still continue and her new hunter extracurricular with ben.