Folkloric Sidhe NPCs

Sidhe Behaviors (Flip a coin and roll a D6 and D8)

Heads: The Sidhe will offer... 
(1. To trade positions and appearances for a year 2. The secret name of a powerful spirit 3. A single faerie coin 4. The location of a great treasure 5. An invitation to a feast 6. A drink from a mysterious chalice)
For... 
(1. A true name 2. A day of mortal life 3. Your most valuable possession 4. A childhood memory 5. Half of your strength and essence 6. A promise of friendship 7. The promise of an unspecified favor 8. Well made leather shoes)

Tails: The Sidhe always... 
(1. Cries 2. Says less than is necessary 3. Speaks in truths 4. Speaks in song 5. Smiles oddly 6. Heals all wounds)
...
(1. Unless asked a favor 2. Except when offered a gift 3. When outnumbered 4. Under sunlight 5. When annoyed or offended 6. Until hope returns 7. Except when hearing music 8. Except during a feast)

Arthur Rackham

 The Sidhe is offended by (Roll 1D10)

1. Cold iron
2. Salt
3. Mortal food
4. Lies or half truths
5. Crucifixes
6. Mortal laughter
7. Admiration or flattery
8. Doors and roads
9. Human runes and letters
10. Unbathed humans

Appearance (Roll a D20)

1. Wearing animal furs
2. Gaudily dressed in outlandish colors
3. Naked
4. Grey cloaked
5. Stained with blood
6. Familiar as if a figure of prior dreams
7. Earthy and holy
8. Wearing a cloak of raven, gull, swan, or dove wings
9. Princely and beauteous but with cruel eyes
10. Wearing blue woad dye on the face
11. Slight and sickly
12. Tall and lanky
13. Glowing with moonlight
14. Plated with mossy wooden armor
15. Wearing a dress with a sheathed sword belted
16. White haired and elderly
17. Surrounded by birds, salamanders, mice, or frogs
18. Wearing ragged moth-bitten robes
19. Clothed as an ordinary traveler
20. Dressed as an executioner, bard, druid, or mourner