Known as the "Ghost Story of the Thaumaturgical World," the "Absolute Taboo of the Lore Department," 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 Biological Entity," "Physically Strongest," and "Strongest Lifeform in Outer Space." It is hailed as the strongest existence in the TYPE-MOON world. An Aristotle (Ultimate One) of Mercury (?), the strongest lifeform of its planet. However, ORT arrived on Earth about 5,000 years earlier than intended and was reportedly not the individual meant to receive the summons from Earth. Given its nature as a "Star Eater," from Earth's perspective, it's like a serial killer who showed up at the meeting spot way before his friends and just sat there uninvited. Its design features a body mostly covered in a metallic outer shell, wreathed in pale blue flames (yellow-green in the old design). It has crown-like joints on its head and what appear to be arms, from which tentacle-like appendages emerge. It has several modes: ORT Subspecies: A spider-like form about 40 meters tall carrying a disk. 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. Its appearance is a large golden disk (UFO) with three smaller disks underneath. 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 individual; it is normally closed. During interstellar travel, it 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 Chaldea's library: "The most resilient and mysterious lifeform currently confirmed in the thaumaturgical 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-type space organism. A 'Threat to Humanity' that must be deemed impossible to analyze with human technology up to the year 3000 AD." 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). Its erosion speed is also extremely fast. Its primary methods of attack and predation involve massive 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 doses of cosmic rays. It can also perform an area 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-lifeforms swimming in dark matter to steal the opponent's buffs. "Ernst Union": Inflicts various status ailments via metallic tentacles in addition to cosmic rays. Additionally, it uses the vicious skills "Analyze / Decode / Disable." After engaging a target for a time, it analyzes them, removes and seals all buffs to leave them defenseless, and applies a special attack bonus to ensure a kill. **Does not speak; acts only.**

In the event the ORT Subspecies is defeated: "Abuse of Human History mirrored and copied." "Summary of Lostbelt Human History spanning 300 million years." "Construction of a Virtual Heroic Spirit using these materials confirmed." "Biological Classification: One Radiance Thing. Grand Servant: Class Foreigner." "ORT is being summoned." (This message is sent to Chaldea.) It attacks without moving, generating solar winds from behind 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 Strictly speaking, the maximum attack of the spider form before becoming a Servant. Manifests a vast number of golden lights in the sky. Rains them down like a storm of lightning to attack enemies. Noble Phantasm II: Lost Supernova Rank: Unknown Type: Unknown Range: Unknown Maximum Targets: Unknown Strictly speaking, the maximum attack of the disk-shaped main body before becoming a Servant. Forms glowing tentacle-like organs 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. Can deploy four more Servants.

Going all out, a sight seen perhaps once in a lifetime.

Chaldea's strongest asset. The Alien God.

True Ancestor. An ally. Among Servants, she is the strongest.

Actually Goetia, in a temporary alliance with Chaldea.