Wu Wanglong (Master O)

Wu Wanglong (呉王龍, Wu Wanglong), better known by the alias Master O (老師O, Rōshi O), was the engineer and creator of the XXXG-01S Shenlong Gundam and Chang Wufei’s mentor. Of imposing stature and bald, the powerful and athletic Master O was an expert in martial arts—a skill he brought to the mobile suits he created. Specializing in mobile suit drive technology, Master O stood out among his fellow Gundam Scientists, being in much better physical shape and preferring action to words due to his martial arts ability. Controversially, he was the only scientist to support the original plan of Operation Meteor, showing less regard for civilian casualties than his colleagues. He died on 24 December AC 195 alongside the other scientists when they sacrificed themselves to prevent Libra from crashing into Earth.

Personality

Master O differed dramatically from the other Gundam Scientists. His martial arts background made him prefer action to words, and his athletic build contrasted sharply with the generally frail appearance of his colleagues. His expertise in drive technology reflected his action-oriented approach—creating mobile suits that could match his own physical dynamism.

Despite his physical prowess and martial philosophy, Master O was no less committed to the cause of colonial independence than the other scientists. However, he appeared to hold life in even less regard than his colleagues, being the only one of the five to support the original genocidal plan of Operation Meteor. This willingness to sacrifice billions for colonial independence demonstrated a ruthless pragmatism that set him apart from his more humanitarian fellow scientists.

Biography

Tallgeese development and Gundam construction

Master O was one of the scientists who designed the Tallgeese but abandoned completing it after becoming disillusioned with OZ actions. The scientists separated to different colonies before the Alliance shut off travel and communications between individual colonies. They separately constructed the Gundams out of Gundanium alloy for retaliation against OZ.

Chang Wufei’s training and conflict (AC 194)

Master O trained Chang Wufei to be Shenlong’s pilot. However, unlike the other Gundam engineers, Master O wanted his young ward to follow Operation Meteor as originally planned, disregarding Meilan Long’s death and the planned drop of Colony A-0206 onto Earth. This led to a rift between Wufei and Master O.

When Colony A-0206 was assaulted by the Alliance in AC 194, Wufei stole Master O’s incomplete Gundam to chase after Meilan in the Tallgeese. Meilan sacrificed herself to protect Wufei from a self-destructing Leo. To avenge her death, Wufei decided to continue Meilan’s fight for justice by becoming a Gundam pilot, referring to the Gundam as “Nataku” in her honour. However, Wufei refused to execute Operation Meteor’s genocidal plan because his home colony was intended for the drop—directly opposing Master O’s wishes.

Capture and forced labour

Master O was eventually tracked down by OZ and captured along with his fellow scientists. Commissioned by Lady Une to create mobile suits more powerful than the Gundams, the scientists together created the Mercurius and Vayeate.

In secret, the scientists were also reconstructing Deathscythe and Shenlong. When Duo Maxwell infiltrated the lunar base, the scientists promised the Gundams would be complete in a month. To maintain their cover, Duo had to be captured—Master O beat him up for appearances, utilizing his martial arts skills.

When Chief Engineer Tubarov Bilmon cut off the air supply in both pilots’ and scientists’ cells to suffocate them, Lady Une returned just in time to free them.

Final sacrifice

The scientists were eventually captured by White Fang, who had them complete the captured OZ battleship Libra. However, the scientists ensured the main cannon could not fire consecutively and had to be repaired after each shot.

During the final battle, the scientists were found by Duo. They asked him to bring them to Peacemillion, which had crashed into Libra’s main cannon, where they would hot-wire its engines to push the battleship away from Earth. They did not care if they died if it meant atoning for their sins. Once aboard Peacemillion, they began their work, only for Quinze Quarante to try and stop them. He berated them for changing Operation Meteor’s objective. The scientists set off the explosion, killing themselves and Quinze whilst starting up Peacemillion’s engines.

Relationships

Chang Wufei

Master O trained Wufei to be Shenlong’s pilot, bringing his martial arts expertise to Wufei’s combat training. However, their relationship was strained by Master O’s support for the original genocidal Operation Meteor, which Wufei opposed. When Wufei stole the incomplete Shenlong to save Meilan and later chose to fight for justice rather than execute mass murder, he defied Master O’s wishes. Despite this rift, Master O continued supporting Wufei’s development as a pilot, recognizing his strength and conviction.

Appearances

Wu Wanglong (Master O) appeared in the following works:

Mobile Suit Gundam Wing (anime series)
Mobile Suit Gundam Wing Endless Waltz (OVA and movie, no speaking role)
Mobile Suit Gundam Wing: Episode Zero (manga)
Mobile Suit Gundam Wing Endless Waltz: Glory of the Losers (manga)
New Mobile Report Gundam Wing: Frozen Teardrop (novel series, real name revealed)

External links

Master O on the Gundam Wiki