n medium humanoid 

Perception +9; darkvision

Languages Common

Skills Athletics +7, Deception +8, Diplomacy +8, Intimidation +8 (+10 to Demoralize with Threatening Lunge), Society +6, Stealth +8

Str +3 Dex +4 Con +3 Int +2 Wis +3 Cha +4

AC  18; Fort +7, Ref +8, Will +9

HP 30; Immunities sleep

Attack of Opportunity [R] Jaws only

Drink Oil [R] Trigger The rokurokubi is the target of an alchemical bomb Strike; Requirements The rokurokubi is aware of the attack, not flat-footed against it, and doesn't have a creature grabbed with their jaws; Effect The rokurokubi attempts to catch the flung bomb in their mouth. They gain a +4 circumstance bonus to AC against the triggering attack. If the attack misses, they catch the bomb in their mouth and harmlessly drink its contents down, regaining Hit Points equal to the bomb's item level.

Speed 25 feet

Melee [>] jaws +10 (finesse, reach 10 feet), Damage 1d8+3 piercing plus 1d6 persistent bleed

Melee [>] claw +10 (agile, finesse), Damage 1d8+3 slashing

Extend Neck [>] The rokurokubi extends their neck, increasing the reach of their jaws Strike from 10 feet to 20 feet until the end of their next turn.

Threatening Lunge [>>] Requirements The rokurokubi's neck is not currently extended; The rokurokubi's head comes within an inch of their target's face before striking. They Extend their Neck, attempt to Demoralize one opponent within 20 feet, and then make a jaws Strike against that opponent. Their Demoralize check is a visual rather than auditory effect, and they don't take a penalty if the target doesn't understand their language.

Bestiary 3, page 216.