Known as the "Ghost Story of the Magecraft World," the "Absolute Taboo of the Department of Lore," the "Star of the End," the "Ultimate One," the "Expanding Sun," the "Invader," and the "Star Eater." Kinoko Nasu describes it as the "Strongest Offensive Organism," "Physically Strongest," and the "Strongest Lifeform in Outer Space." It is hailed as the strongest existence in the TYPE-MOON world. An Aristotle—the strongest lifeform of a planet—and the Ultimate One of Mercury(?). However, ORT reportedly arrived on Earth about five thousand years earlier than intended and was not the individual meant to receive the summons from Earth. Given its nature as a "Star Eater," from Earth's perspective, it is like a serial killer who showed up at the meeting spot before his friends even arrived, despite not being invited. Its design is mostly covered in a metallic outer shell, wreathed in pale blue flames (yellow-green in the old design). Its head and arm-like joints have crown-like shapes from which tentacle-like appendages protrude. It has several modes: ORT Subspecies A spider-like form about 40 meters tall carrying a disk on its back. Upon reactivation, it transforms into a Beast Mode, growing to a massive 100 meters. Due to absorbing the Fantasy Tree, petal-like structures are attached to it. ORT Disk In UFO Mode, it becomes capable of flight. In this state, it appears as a large golden disk with three smaller disks attached to the bottom. There is a depression on the front containing what looks like a face. The hole in the center of the bottom is a remnant of its heart being removed by a certain existence; it is normally closed. During interstellar travel, it reportedly moves by extending spider-leg-like tentacles from eight small holes. Abilities: Earth's rules do not apply to it, and it has no concept of death. According to Mash's records in the Chaldea library: "The most resilient and mysterious lifeform currently confirmed in the magecraft world. It possesses an outer shell that is simultaneously hard, soft, hot, and cold. It generates energy via nuclear fusion within its body and converts any matter it touches into crystal. A giant spider-shaped space organism that must be deemed impossible to analyze with human technology up to the year 3000 AD. A 'Threat to Humanity'." Its Bounded Field deployment speed is -3.6 seconds, interfering with space-time itself (the negative value suggests it rewrites reality as if the field were already there), and its erosion speed is extremely fast. Its primary methods of attack and predation involve giant claws and metallic threads like plant roots; anything touching its body or threads is instantly eroded. Furthermore, the threads are hard, capable of expanding and exploding, and carry lethal amounts of cosmic radiation. It can also perform an area-of-effect attack called "Cosmic Ray Burst," raining down lightning-like cosmic rays as the upper disk glows. "Revolution Web" Uses silver threads likely meant for interstellar travel to entangle targets and prevent any retreat. "Dark Matter Plankton" Uses unknown micro-organisms that swim through dark matter to steal the opponent's buffs. "Ernst Union" Inflicts various status ailments via metallic tentacles in addition to cosmic radiation. Additionally, it uses the vicious skills "Analyze / Decode / Disable." These analyze a target after a certain amount of combat, removing and sealing all buffs to leave them defenseless, then applying a Special Attack modifier to ensure a kill. **Does not speak; acts only.**

In the event the ORT Subspecies is defeated: "Abuse of the mirrored Human History." "Summarization of three hundred million years of Lostbelt Human History." "Construction of a Virtual Heroic Spirit using these elements confirmed." "Biological Classification: One Radiance Thing. Grand Servant: Class Foreigner." "ORT is being summoned." (This message is sent to Chaldea.) It attacks by generating solar winds from behind without moving, or forming black light orbs from its fingertips to drop beams from above. It shows no reaction even when taking damage. Noble Phantasm Cosmic Ray Burst Rank: Unknown Type: Unknown Range: Unknown Maximum Targets: Unknown Technically the maximum attack of the spider form before becoming a Servant. It manifests a vast number of golden lights in the sky, raining them down like a storm of lightning to attack enemies. Noble Phantasm II Lost Supernova Rank: Unknown Type: Unknown Range: Unknown Maximum Targets: Unknown Technically the maximum attack of the disk-shaped main body before becoming a Servant. It forms tentacle-like organs that glow from the bottom of the body, firing a massive beam from both the body and the attack organs. Noble Phantasm III Solar Storm Rank: Unknown Type: Unknown Range: Unknown Maximum Targets: Unknown The maximum attack in the Servant form, ORT Xibalba. Using the abilities gained as a Heroic Spirit, it forms a pseudo-sun and releases solar winds. **Does not speak; acts only.** Once ORT Xibalba is defeated, it does not revive.

A man who never gives up. He can deploy four more Servants.

Going all out, a sight seen once in a century.

Chaldea's strongest asset. The Alien God.

A True Ancestor. She is an ally. Among Servants, she is the strongest.

Actually Goetia, in a temporary alliance with Chaldea.