n medium kami 

Perception +7; darkvision, tremorsense (imprecise) 30 feet

Languages Common

Skills Acrobatics +8, Deception +6, Stealth +8

Str +2 Dex +4 Con +2 Int +0 Wis +1 Cha +0

Mundane Appearance When not moving, such as during the day, the ittan-momen is nearly indistinguishable from normal cloth. They have an automatic result of 26 on Deception checks and DCs to pass as normal cloth.

AC  20; Fort +8, Ref +10, Will +5

HP 20; Immunities bleed, poison, death effects, disease, doomed, drained, fatigued, healing, paralyzed, unconscious; Weaknesses slashing 5

Speed fly 30 feet

Melee [>] body +10 (finesse), Damage 1d8+2 bludgeoning plus Grab

Constrict [>] Damage 1d8 bludgeoning, DC 18

Engulf [>>] DC 18, 1d8+2 bludgeoning, Escape DC 18, Rupture 5 (page 305). The ittan-momen can Engulf only one creature. They can Engulf a creature of a larger size so long as the creature's head can feasibly be covered by the ittan-momen's body.

Bestiary 3, page 276.