Scylla

Scylla (スキュラ Sukyura) is a Titan who first appeared in the 2019 Legendary Pictures Godzilla film, Godzilla: King of the Monsters.

Awakened from her resting place under Sedona, Arizona by King Ghidorah's call in 2019, Scylla attacked the nearby city of Phoenix before being pacified when Madison Russell activated the Orca in Boston. Scylla and the other Titans that Ghidorah had awakened then converged on Boston, where they submitted to Godzilla after he defeated Ghidorah. Some time later, Scylla attempted to acquire a nuclear warhead for food, putting her in conflict with the United States Coast Guard. Godzilla arrived and battled her, eventually forcing her to withdraw.

Personality
Monarch classifies Scylla's behavior as that of a "destroyer," along with fellow Titans King Ghidorah, Rodan, MUTO Prime, Camazotz, Mechagodzilla, and the Skull Devil. She is a Titan scavenger, who actively seeks out sources of radiation on which to feed. This at one point places her into conflict with the United States Coast Guard and even Godzilla, even though she had earlier submitted to him.

Origins
Scylla was discovered by Monarch in the Arizona desert, and Outpost 55 was constructed around her. Other details about the creature's origins are unclear, other than Monarch confirming she is the same as the mythological Scylla.

Godzilla: King of the Monsters
Scylla was awakened from her slumber in Arizona by King Ghidorah's call, which also awakened many other Titans around the world. Scylla's legs tore through the desert near an oilfield as she erupted from underground. Like the other Titans, Scylla rampaged through populated areas, destroying buildings in nearby Phoenix with her colossal legs. Eventually, she made her way to Boston along with Methuselah, Behemoth, the Queen MUTO, and a flock of Leafwings. There, they found the alpha they were following, Ghidorah, slain at the hands of Godzilla. Rodan approached Godzilla to challenge him, but was intimidated by his gaze and ultimately submitted. The other Titans all followed suit, each "bowing" in their own way to the new King of the Monsters. Later on, Scylla was reported to have left human civilization and taken up residence in a lake. The creature was also credited with slowing down the melting of the polar ice caps.

Physical abilities
Scylla utilizes her massive legs to effortlessly smash through buildings, and even pierced Godzilla's skin with them in Godzilla Dominion. Though ultimately defeated, she was briefly able to hold her own against the King of the Monsters. She is highly maneuverable.

Temperature manipulation
Through unspecified means, Scylla is able to slow the melting of the polar ice caps.

Bacteria generation
Monarch describes Scylla as "bio-corrosive." After feeding on a slain Titan, Scylla can convert its nutrients into a deadly water-borne bacteria.

Shell
Scylla can exit her shell at will, presumably to escape another Titan's grasp. Though she is vulnerable to attack until she can grow a new shell, she will compensate by burrowing into a rock face or molding sunken warships into temporary armor.

Tentacles
Scylla can launch her tentacles at opponents. This was sufficient to disorient Godzilla and send him stumbling backward.

Amphibiousness
As shown in Godzilla Dominion, Scylla is able to propel herself quickly through the water with her legs. Her top speed underwater is unknown, but she is even faster than Godzilla.