The way I created the Sylph is is the opposite of how I handle most beasts. I usually try to scale them down to lower HD levels to introduce them at an earlier point in the story as an (N)PC. If a player wanted to use one, I would just use the Sylph from the PF books - but what is shown here this is the default, for most sylph in my world. They are a happy, energetic people, willing to help fight evil but also to fly around, observe others from afar, play games and music.
Medium Sized Fey (Air)
Hit Dice: 5d8+3 (17 hp)
Initiative: +7 (Dex and Imp Initiative)
Speed: 30 ft; Fly 50 ft (good)
AC 17 touch 13, flat-footed 14 (+3 Dex, +4 natural)
Base Atk +2 CMB +0 CMD 13
Melee Rapier +5 (1d6-2) or Shortbow +5 (1d6)
Special Qualities: Invisibility (3 times a day), Spells
Saves: Fort +2, Ref +7, Will +6
Abilities: Str 7, Dex 17, Con 12, Int 11, Wis 14, Cha 17
Skills: Diplomacy +6, Escape Artist +8, Heal +6, Knowledge (local or music) +7, Perception +8, Perform +6 (Wind), Stealth: +8,
Feats: Hover, Imp Initiative, Weapon Finesse
Environment: Any Aerial Location (Towers, Remote Spires or Cloud Isles)
Organization: Solitary or pair
Languages Air Elemental, Avian, Fey, Elf, Dwarf, Common
Challenge Rating: 5
Alignment: Usually Neutral Good
Advancement: By character class (sorcerer, rogue or ranger)
These elemental spirits of air resemble gossamer winged petite humans, usually dressed in light colours and small pieces of jewelry. Attractive and playful; love to tease and joke with good aligned creatures that they encounter. Often their teasing is a form of subtle way of getting potential allies to come to their help in defending against evil or those who would harm nature or animals. They are a reclusive people, it is a rare and dangerous time when more than a few are ever in the same place at the same time.
They rarely speak out in front of crowds, they usually whisper in the ears of allies, but they do laugh out-loud as they cannot help themselves in moments of glee. More then one falling person of good alignment has been mysteriously rescued by an invisible sylph. The have a great deal of respect of spellcasters, musicians and artists, and will often take an opportunity to reflect on beauty or art.
They have a wonderful relationship with most creatures that reside in mountainous or wild locations, in particular Dwarves, Elves, Jahlen & Phaetox. Always willing to help in times of danger, acting as a scout or warning them of danger. At the same time, they do ask favours, and have at times raised small armies to help them in their tasks.
They are heavily associated with spires - mile high mountains that act similar to islands in the sky. Yet, many do have homes in the cities, near Towers of magic or other crafts. They spend much of their time invisible, and watching children and musicians. They would be a terrific force for good if focused on long range plans, but their interest like their attention span is often compared to a fleeting breeze.
Their gossamer wings are fragile to physical attack - if they take more than 5 points of damage, they are hobbled for the day and cannot fly for the rest of the day. Normal physical attacks, even to the Sylphs back does not harm the wings, only a deliberate attack. Treat their wings as having a +5 AC deflection bonus in comparison to their regular AC. Spells or magic cannot harm the wings. They regenerate after 8 hours of rest or a cure critical spell is applied to them.
Many mortals believe all Sylph are female, but their numbers are balanced. They are an openly loving species, often getting or being confused with the standard sexual paradigms some mortal creatures seem bound with. They love, just as much as they consume or play or dance, many sylph fornicate without regard, if their partner is a willing one. Other uptight creatures are sometimes confused when a paramour reveals their gender and it is not what they expected.
Sylphs rarely engage foes directly. Most will try to use their spells to avoid confrontation or to get potential allies to help them. Their two great advantages are their flight and invisibility. The rare sylph that advances in character level, usually does so as either a sorcerer, rogue or ranger.
Energy Resistance: Sylphs have electricity & wind resistance 15. they gain +2 for any new HD or level gained
Abilities: Gust of Wind, Detect Good (1/charisma bonus)
Featherfall (self or any one other in a 50 ft range), Invisibility (3/day)
A Sylph can remain invisible an unlimited amount of time. If they take an action that would make them noticeable, they remain visible until they get unnoticed for one full minute.