[Starfinder has a number of D&D/Pathfinder monsters... in SPAAACE. The void hag is one of these, and one that I think translates better back to Pathfinder than say, scavenger oozes do. My issue with the void hag as written comes from a disconnect between its abilities and its flavor text. The Alien Archive goes into great detail about how a void hag makes its robes, which would involve jaunts between multiple star systems and nebulae. But the void hag doesn’t have any way to quickly move through space, nor does the entry talk about them having space ships to make the trip. Space is big, y’all. So I gave it starflight.]
Void Hag
CR 10 CE Monstrous Humanoid
This woman has gray skin pocked with craters, as if she was made out of the surface of the moon. She wears strange robes which move with her as a second skin, and her long hair glimmers with starlight. She is very tall and lean, with long limbs, her spindly fingers ending in claws.
Void hags are powerful hags native to the airless expanses of space. They typically live on desolate moons, asteroids or even comets, plotting how best to subjugate other creatures and increase their knowledge and power. Void hags are incredibly intelligent and incredibly arrogant, and enjoy punishing other creatures for not being as brilliant as they are.
On occasion, a void hag will make planet-fall and join with other hags in a coven. Void hags cannot stand to be in anything except a leadership position within these covens, and they will kill rivals who attempt too often to assert authority. Covens comprised of only void hags do exist, and are somewhat more stable, but each member usually has a plan to betray their fellows if they need to, and to fight against such betrayals themselves. A coven with a void hag adds the following spell-like abilities to their coven magic ability: mass inflict pain, reverse gravity, and slay living.
Void Hag       CR 10
XP 9,600
CE Medium monstrous humanoid
Init +7; Senses darkvision 60 ft., Perception +19
Defense
AC 25, touch 19, flat-footed 21 (+3 Dex, +1 dodge, +5 deflection, +6 natural)
hp 127 (15d10+45)
Fort +10, Ref +12, Will +13
DR 10/magic; Immune cold, disease, fear, sleep; SR 21
Defensive Abilities starlight robes
Offense
Speed 30 ft., fly 60 ft. (perfect)
Offense 2 claws +16 (1d10+1)
Spell-like Abilities CL 10th, concentration +17
At will—inflict pain (DC 17), searing light
3/day—ice storm, irradiate (DC 18), empowered searing light
1/day—enervation, suffocation (DC 20)
Statistics
Str 13, Dex 17, Con 17, Int 26, Wis 18, Cha 20
Base Atk +15; CMB +16; CMD 35
Feats Combat Casting, Combat Expertise, Dodge, Empower SLA (searing light), Flyby Attack, Great Fortitude, Improved Initiative, Mobility
Skills Acrobatics +15, Bluff +17, Craft (weaving) +23, Fly +26, Knowledge (arcana, dungeoneering, geography, nature) +20, Intimidate +20, Perception +19, Sense Motive +16, Stealth +18, Spellcraft +20, Survival +19, Use Magic Device +17
Languages Aklo, Common, Undercommon
SQ no breath, starflight
Ecology
Environment any
Organization solitary or coven
Treasure standard
Special Abilities
Starflight (Su) A void hag can survive in the void of outer space. It flies through space at an incredible speed. Although exact travel times vary, a trip within a single solar system should take 3d20 hours, while a trip beyond should take 3d20 days (or more, at the GM's discretion)—provided the void hag knows the way to its destination.
Starlight Robes (Su) A void hag’s robes are her most prized possession, and possess supernatural power when she wears them. A void hag gains her Charisma bonus as a deflection bonus to AC and CMD when wearing her starlight robes. In addition, once per day, she can create a pulse of force affecting all enemies within a 30 foot radius. All creatures in the area take 10d6 points of force damage and are covered in a blanket of starlight that grants a -20 penalty to Stealth checks and negates concealment from spells and effects as per the glitterdust spell. A successful DC 22 Reflex save halves the damage and negates the glitterdust effect. The save DC is Charisma based. This is an effect of the hag, not the robes themselves, although each set of starlight robes is a valuable art object in and of itself.