Gaku Washio

"Noble Eagle! GaoYellow!"

- Gaku

Haku Washio is GaoYellow of the Gaorangers.

Gaoranger
Gaku is a 23-year-old former Self Defense Force pilot. He was the first Gaoranger to be chosen who worked a year alone with only Tetomu. Tetomu recruited him during a flight mission, and he became missing in action. Because of this, he bleached his hair to become less recognizable. As a pilot, he is good at skydiving and English and his hobby is playing the ukulele. At first, Gaku was very serious and humorless, he was upset that Kakeru has been chosen as leader instead of him and he was demoted to second-in-command. As time went on, Gaku opened up, and became especially close to Kakeru, often teasing him good naturedly.

Gaku is the one who insisted that the Gaorangers refer to each other by color and not use their personal names. Being his Power Animal a bird, Gaku refuses to eat bird meat (he seems to be the only one to have this tendency; neither Soutarou nor Kai have shown any problem eating cow meat and fish, respectively). He is in charge of forming any leftover parts for the Gaorangers' mecha formations. After the final battle, he returned to the Air Force and his natural hair color. In most of the episodes, Gaku speaks some English language when in heavy condition.

Gaoranger vs. Super Sentai
to be added

Gaoranger vs. Gorenger
to be added

Hurricaneger vs. Gaoranger
to be added

Gokaiger
Years later, Gaku fought alongside not only his own team, but every single Sentai ranger in existence, against the Empire of Zangyack when it attacked the Earth in the Great Legend War. After fighting against hundreds of Gormin and their Zgormin commanders. AkaRenger noticed the fleet moving towards them, he gathered all the Rangers together and gave them the order to sacrifice their powers to wipe out the first invasion's armada. The GaoYellow powers are later used by Luka Millfy via the Ranger Keys.

After the Gokaigers defeated the Zangyack, Marvelous returned the Ranger Keys to their original owners. It is assumed Gaku and his team have their powers back.

Super Hero Taisen
Gaku, alongside his team (bar GaoSilver), among the majority of the Super Sentai heroes, was caught up in the "Super Hero Taisen" incident which eventually resulted in the Super Sentai teams and Kamen Riders joining forces to defeat both Dai-Zangyack and Dai-Shocker.

Gaoranger video game
GaoYellow appears with his team in the Hyakujuu Sentai Gaoranger video game.

Power Animals

 * GaoEagle
 * GaoBear & GaoPolar

Arsenal

 * G-Phone
 * Beast King Sword
 * Gao Jewels
 * Eagle Sword
 * Feather Cutters

Ranger Key
The GaoYellow Ranger Key (ガオイエローレンジャーキー) is Gaku Washio's personal Ranger Key and what became of his powers after he along with the rest of the 34 Super Sentai sacrificed their powers to end the Great Legend War.

This key along with the majority of the Ranger Keys were collected by the Red Pirates and later used by the Gokaigers. The GaoYellow Ranger Key was mainly used by Luka Millfy (Gokai Yellow), who used it to fight as GaoYellow. It was also used by Captain Marvelous (Gokai Red) on one occasion.
 * When the first three Gokaigers became the Gaorangers while fighting Cosmic Kenpō Master Pachacamac XIII.
 * When the Gokaigers became the Gaorangers while fighting against the Sneak Brothers' Gormin Sailors.
 * When the Gokaigers became the Gaorangers while fighting against Action Commander Bowser.
 * When the Gokaigers became the Gaorangers while fighting against Action Commander Zakyura.
 * Marvelous became GaoYellow as part of an all-yellow change on Christmas Eve to defeat a duo of Dogormin.
 * As part of a bombardment of changes in the final battle with Emperor Ackdos Gill.

After Zangyack were finally defeated, the Gokaigers gave the Ranger Keys back to their rightful owners. It is presumed that Gaku received his key and became GaoYellow once more.

Imitations
A copy of GaoYellow was created by Copy Org as part of the Copy Sentai Copyranger. Org copies of the Gaorangers, Copy Org created these clones with horns, they were killed by the special attacks of the Gaorangers. A shadow-clone GaoYellow was created by Dorodoro's ninja powers as part of the Shade Rangers. The Gaorangers could not destroy these shadows without killing themselves in the process. After GaoRed used his Falcon Summoner to kill Dorodoro, the Shaderangers then disappeared.

Portrayal
Gaku Washio is portrayed by Kei Horie (堀江 慶). As GaoYellow, his suit actor was Yasuhiro Takeuchi (竹内 康博).