I never got to play this character very long, but I had this idiot rich draconic bloodline Sorcerer whose parents had hidden the fact that they were a Tiefling from them.

As far as they knew, they were a half-orc with a skin condition, born when their father was shamed and banished, and their mother was swept off their feet by a gallant orc of the hinterlands. (lol, no, the parents are evil AF demon worshippers spawning teiflings into the bloodline, and they're too dumb to realize it. No hot orc babydaddy to speak of)

They cut off the tail and cauterized the horn buds really early, and basically the plan was to see if they discovered the Draconic Bloodline before or after getting hit by a strong enough healing spell to restore their demonic features.

They probably wouldn't be able to understand the idea that they could be both part demon and part dragon, and part Good aligned and part Evil aligned creature, to boot. Comedy gold in the right party.