Monster Spotlight: Gancanagh
Chaotic Good Medium Outsider
These graceful, fey-like entities are one of many breeds of Azata, the celestial natives of Elysium, and like their brethren they exist to spread hope, bring cheer, and fight Evil wherever it may arise. Like many of their kin, this involves using their at-will Change Shape to assume the form of any number of Small or Medium Humanoids, masquerading as the mundane so that they may better catch villains off-guard, or perhaps offer unseen assistance to actual mortals without revealing their true nature... though UNlike most azata, a Gancanagh (which I'll refer to as Gans or Gancans from here on out) looks effectively like a normal--albeit incredibly beautiful--human or half-elf when out of disguise, so their Change Shape is less for hiding and more for meeting the standards and preferences of their potential partners.
Gans embody all that is Good about free love, sexuality, and experimenting with one's self, and as such they are filled with righteous passion... and an irrepressible drive to flirt with just about anyone and everyone they meet. They're incredibly adept sweet-talkers who, unlike the fiendish succubi and incubi (whom they despise with incredible intensity), mean everything they say. Gans can and will hone in on the best qualities of their current targets via casual conversation, with the intention of inspiring a brief but meaningful romance, pulling people into whirlwinds of passion before breaking away and seeking new love. Rather than leaving a trail of broken hearts in their wake, Gans work tirelessly to assure their partners know that the meetings are temporary but meaningful nonetheless, encouraging them to use their experiences and experiments with the spirits to seek out true, lasting love in whatever form it may be... and sometimes, this means these alluring azata play matchmaker with everyone they bed, introducing them to one another if they think something can bloom between them.
And the thing is? They're rarely ever wrong. Guided by higher forces of passion and emotion, Gans have a knack for saying the right things to the right people... provided they aren't sauced due to their devotion to certain OTHER higher forces. Yes, Gancans are quite the party animals, frequently getting deep in their cups and encouraging others to do the same, if only to join them on the dance floor later without fear of how they look. If you can't dance without music, don't worry, as they can provide via their +13 to Perform (Wind Instruments), always carrying fanciful flutes to break out at a moment's notice to provide mood music.
Gans seem to have an oral fixation (FURTHER JOKES WITHHELD), not only preferring wind instruments, but carrying around elaborate smoking pipes and alluring tobacco blends... which typically sit unused at the Outsider's hip, are held unlit between their teeth, or get offered to other people as bribes, because a Gans' lungs are extremely Vulnerable to Smoke. This vulnerability causes the azata to take a -4 penalty against any gas-based effect, and assures that a single puff from their pipes or any other smoking paraphernalia will cause an amusing and potentially charming coughing fit, no matter how mild the blend.
So, three paragraphs devoted to their lore, but what about what happens when they fight? Well, ideally, there won't be fighting. Gancans are--and I'm extrapolating based on presented evidence here, and could be wrong--lovers, not fighters, and have a few tools to dissolve tense situations. They have potent social skills, possessing a +13 to Bluff and a +15 to both Diplomacy and Intimidate, typically enough to prevent some battles from breaking out one way or another, and if those don't work, they can use Charm Person and Suggestion both at-will to temporarily turn foes to friends... or at least keep them from fighting while there's other people still in the room.
Gancans are known to enjoy the occasional spars and wrestling matches, but when facing down foes with rage in their hearts and murder on their mind, they turn into terrifying but graceful forces. Their Grace allows them to add their Dexterity modifier to weapon attacks instead of Str, and while they can only make one attack a round, it's a painful one: 1d6+6 damage, with a crit range of 19-20. They fight exclusively with +1 mithral rapiers, not only allowing them to bypass DR/Silver common amongst fiends, but making them veritable pinatas for anyone that manages to kill or rob one! Good luck, though.
Gancans are protected by 17 AC, eschewing any armor that would prevent people from seeing their bodies and relying only on their Dexterity and natural armor to protect them, though they also have DR 5/Cold iron or Evil to shield themselves from thrown fists and other light weapons. They have 10 Resistance to Cold and Fire and are completely immune to Electricity damage, though that last one's about as unlikely to come up as their immunity to being petrified at the levels one can expect to be fighting one. Once in battle, Gancans also bless themselves and any of their nearby allies with their 1/day Good Hope, making their attacks more accurate and more damaging, while also raising their saving throws from +4/+9/+5 to +6/+11/+7!
Any creature of similar level hoping to slay one of these fierce fey-likes will also have to contend with their 1/day Mirror Image, producing anywhere from 2 to 5 additional targets to soak up whatever attacks are aimed their way. They may only be able to make one attack a round, but at low levels, the same is true for the party, letting the figments absorb entire turns from the martials in the party as the potent and accurate thrusts from the azata's rapiers carve through their HP and willingness to continue fighting.
If you think that only Evil creatures have to worry about fighting one, though, you'd be largely correct; Gans rarely fight to kill against anything but Evil Outsiders, but they're quite hot-headed and can be temperamental when insulted. Many times in history one of them has been driven to cross swords with a potential ally against Evil because that ally insulted the Gan's promiscuity, or one of their past or current partners... and sometimes these become quite serious, especially if the Gan was compared to a fiend that preys upon lust, such as a Succubus or Incubus. This insult is so grave and the fury it inspires in the azata so fierce that they often fight until the offending party is beaten unconscious, rather than just to the point of surrender.
And before we end, let's talk a little more about potent and accurate t[I SAID FURTHER JOKES WITHHELD]. At will, a Gancan can use Invigorating Passion on any willing creature with an act of passion as little as a kiss, gifting that creature a +1 bonus to attack rolls, an extra d10 temporary hitpoints, and the ability to ignore all penalties from being fatigued or exhausted. Not only does this stack with Good Hope, but the Gan can spread the love as much as it feels like... though there is a slight downside in that, at the end of the hour, the blessed target must make a DC 17 Fortitude save or become fatigued (or exhausted). This downside isn't especially impactful if the azata is nearby, as the ability has no per-day limit and no 24 hour immunity, so another round of Invigorating Passion can alleviate its own downside until the target finally lays down to rest for the day. ... and, yes, I know what you're thinking: this does indeed also cover any fatigue and exhaustion accrued during an extended night's stay with one of these legendary lovers.
You can read more about them here.