The title says it pretty well, but Hanna Grace is a Flowing Monk/Warlock Vigilante made using Pathfinder 1st-ed rules. "Hanna" is her Vigilante persona, and she does not hide her android nature while she fights in that form. "Grace" is the slightly older and human-looking Social persona that she uses to blend in. She is therefore a study in contrasts, between an unassuming and frail older woman, a simple crafter, and her younger, more vibrant, and active fighting form.

Mechanically, she is great at single-target damage and area denial. Her trademark is using the Flowing Monks focus on combat maneuvers to trip as either an AoO or direct assault, and Flurrying that into an assault on the prone target with Brutal Stomp and point-blank Eldritch Blasting. Opportunity Attacks are where she shines, since she can turn them into a trip and stomp, and Combat Reflexes makes sure it is not a one-time trick.

Not all campaigns and worlds have Androids from space, but she can easily be an experiment by a long-dead engineer, or a lone crackpot gnome. She does not, herself, know where she comes from, and unless there are other Androids, she knows no one else like her. I flavor her switch from "Hanna" to "Grace" and vice versa as part of her Android form, along with the magic of the Warlock part of her. She believes that it is all just a part of her Android nature. She has a strong instinct to protect her "Hanna" identity, so in populated areas she prefers to be "Grace", and tries to avoid others seeing her change.

Let me know if she can fit in your world somewhere!