You can literally open your Silverpine_Data folder and open the level0 file in notepad++(or whatever you prefer) and you can see it in the sea of compressed data. It can be found easily, you just need to know where to look.
For example:
This is Aldric's personality tags: "posh, firm, confident, clever, keeps to business."
Acacia:"Impulsive, animalistic, ravenous, stealthy."
Celandine: "Lusty, outgoing, playful, doesn't like working too much."
Darian: "Forward, kind, alert, not easily tricked, upstanding citizen." Darian also has, what I call, a "hidden" personality trait that's not in his personality tags. I suspect it's in his set knowledge and private. So, I'll keep it private for him.
Gareth: "Stoic, hard worker, gruff, gentle giant." Hmm, could have sworn he also had "difficult to upset" Maybe it's one of those hidden traits now?
Hayden: "Quiet, introverted, shy, precious, hard worker."
Mirel: "Hardy, doesn't like being in one place for too long, witty, strong for her size." Huh, this part used to be private, but it isn't anymore: "high libido but tries to keep it contained." It also had "hopelessly high libido" but that part got removed it seems.
Oriana: "Cold, doesn't trust strangers, stoic, reserved, intelligent, doesn't like talking to anyone but her sister."
Orson: "Introverted but does enjoy some company sometimes, easily lost in thought, stealthy, loves winter, lighthearted."
Rosalyn: "sweet, motherly, welcoming". Hers is really short for some reason.
I imagine there are several smaller things that are hidden, but are kind of obvious if you play the game long enough, like how Oriana likes lavender. Though it's hard to tell how much of such things are hallucinations.
You can find the player character descriptions as well, though the NPC descriptions are encrypted now. Luckily, I still have 1.2.4 release I can use as reference from before the encryption. Though I can take a hint and not reveal it since dev encrypted it for a reason, I guess.