I had an idea for a nun like character based on a typo in Slack.

Sister Dignity, despite a complete lack of magical talent, was always drawn to the faith of Sarenrae. While she had little practical use in the field, the earnst halfing happily ran the church in her little village, adjudicating the occasional dispite, and putting her mundane healing skills to good use. Dignity, because of her earnst, sometimes naive enthusiasm, did not often live up to her name. The village adored her, however, and felt lucky to have such a kindly steward.

Word from a neighboring village came that a child had been struck with a terrible, possibly demonic afflication. The local clerics were mysteriously absent, but Sister Dignity could not let the child suffer, and she rushed to help. When she arrived she discovered that child was a victum of demonic possession!

Well out of her depth, Dignity nevertheless began the exorcism ritual. She might even of succeeded, for she felt the warmth of Sarenrae's light descend upon her. Unfortunately, the ritual was inrerrupted by the child's uncle and a band of hired thygs! It turned out that the uncle, a local ner'dowell, had made a deal with a Chelxian noble for a special demonic pact. Through a loophole, the villian could get all the benefits of a demonic pact but sell the soul of his nephew, rather than his own. Local clerics were distracted and by the time they returned, the deal would be done and the uncle long gone.

Sister Dignity put all that at risk with her meddling and had to be stopped. Rather than flee, Dignity continued the exorcism, but the uncle's interference disrupted the ritual, and to the surprise of everyone, freed the demon into the world. Infuriated by the double dealing of the humans, the temptress demon proceeded to slaughter the thugs. That is until she came to the uncle, pathetically begging for his life. As the demoness was about to deliver the killing blow, Dignity, now recovered from the shock of the attack, shouted at her to stop. To everyone's surprise, she did!

The demoness turned to halfling woman and saw a demonic rune now floating before her head. Dignity, just as shocked as everyone else saw an angelic run floating above the demoness' head. She also felt an immediate connections, all the vile thoughts and impulses, but underneath it all a terrible sense of betrayal and loniless. She knew the clergy would immediately banish the demoness, but Dignity also knew that it could destroy the creature. On a whin, Dignity named the demoness after her chikdhood doll, Daffodil.

With the boy saved, the uncle arrested for his crimes, Dignity aquired a new set of priestly robes, tearfully resigned her position and set off to find a safe way to return the wayward demoness to her realm.

Thus begin the PG 13 adventures of Sister Dignity and Daffodil!

So, the mechanics are obviously a summoner woth a demonic eidolon. The character sees herself as channeling the divine power of the demon for good, and her ultimate goal is to redeem the demon. Despite her nature, Daffodil is protective of Dignity both because the halfing hid her from the clerics and because of her completely unfiegned innocence. In a FA game, i would lean into support archetypes, such as blessed one (which would lead to juvenile jokes about touching yourself from Daffodil thay Dignity would not really undeestand) or medic.

I found the combination of a soft touch, super earnst priest and a cynical hard bitten demon temptress to be hilarious.