Paz Socorro is Spider’s mom in Avatar 2. This answer comes from the wider Avatar story, not from a big on-screen reveal in Avatar: The Way of Water.
Spider’s mother is Paz Socorro, a former RDA pilot who had Spider with Quaritch before she died on Pandora.

Spider’s family story shapes how you read his choices in the movie. Avatar: The Way of Water gives you pieces of the puzzle, while the comics and prequel material fill in the missing part about his mother.
The Direct Answer

Avatar: The High Ground, the comic prequel tied to Avatar: The Way of Water, confirms that Paz Socorro is Spider’s mother. That backstory explains why Spider has deep ties to Quaritch even though he grows up with the Sullys.
Paz Socorro Is Spider’s Mother
Paz Socorro worked as a Scorpion pilot for the RDA. Her relationship with Quaritch led to Spider’s birth.
The ScreenRant breakdown of Spider’s mother explains that Spider, whose birth name is Miles Socorro, was born in 2154.
What Avatar: The Way of Water Confirms On Screen
The movie does not spell out Paz Socorro’s name in a big scene, so you may miss the answer if you only watch the film once. The film makes it clear that Spider is Quaritch’s son and that his past is tied to the human side of Pandora.
Where The Full Answer Comes From
The expanded Avatar material, especially Avatar: The High Ground, gives you the full answer. That comic provides the missing family history and connects Spider’s origin to Quaritch, the RDA, and the old conflict on Pandora.
What Happened To Paz Socorro

Paz Socorro’s story is brief, violent, and important to Spider’s life. Her role in the war on Pandora explains why Spider grows up without a real mother and why his identity feels so split.
Her Role In The RDA On Pandora
Paz served as a SecOps Scorpion pilot for the RDA during the first Pandora conflict. She flew with Quaritch’s team and took part in the attack on the Na’vi.
How She Died During The Conflict
The Na’vi killed Paz during the fighting on Pandora in 2154, shortly after Spider was born. Her death left Spider orphaned as an infant.
What Her Death Meant For Spider
Because Paz died so early, Spider never got the chance to know her. That loss shaped his bond with the Sullys and his mixed feelings about both humans and Na’vi.
How Spider Connects To Quaritch And The Sullys

Spider stands at the center of two families that pull him in different directions. Quaritch gives him his bloodline, while Jake Sully and Neytiri shape the home where he grows up.
Why Quaritch Matters To Spider’s Backstory
Quaritch is Spider’s biological father, and that link drives much of the tension around the character. Spider faces the fact that the man tied to his birth is also a violent enemy, played by Stephen Lang, who returns in the sequel with a new body.
Jake Sully And Neytiri’s Complicated Role In His Life
Jake Sully and Neytiri raise Spider in the orbit of the Sully family. They become his emotional home on Pandora.
That bond is not easy, especially when Neytiri’s anger toward humans puts Spider in danger and shows how fragile his place really is.
Why Spider Feels Caught Between Two Worlds
Spider is played by Jack Champion. His character’s biggest struggle is not just family drama, it is belonging.
He has human roots, Na’vi friendships, and a link to Kiri, yet he does not fully fit into any one group. This is why his story in Avatar 2 feels so personal and painful.