The character concept I came up with is a warlock who struck a deal with her patron after the murder of her father and now her sole purpose is finding out who killed him and exacting her vengeance upon them.
If it helps envision what I have in mind I got the idea from the song Blood Red Roses by C21FX
Specifically these lyrics
A wretch hellbound and bent on blood
Toil begat by father’s blood
This path was laid before her
Redemption born by brigand’s blood
A blight upon the darkness
The pact embraced, a road unsought
The Maiden of Death won’t be unwrought
Vengeance is her only ward
Beware the blood red rose’s thorn
I was listening to the song and the idea struck me to make a character based on it but I’m not sure what patron would be the best for her.