Ultraman Blu

Ultraman Blu (ウルトラマンブル) is one of the two main heroes of Ultraman R/B and is the younger brother of Ultraman Rosso and the older brother of Ultrawoman Grigio.

Etymology
His name means "Blue" in Italian, which refers to his main form's body color being blue.

Pre-Ultraman R/B
In the past, three warriors from Planet O-50 were sent to defeat Reugosite, a planet-eating monster that destroyed everything in its path. The three warriors managed to repel Reugosite to the outer reaches of space. However, something happened and the three of them crashed landed on another planet.

1300 years ago, a meteor crashed down in what became Ayaka City, creating a massive crater and unleashing Grigio Bone. According to legend, the Ultraman siblings, Rosso and Blu fought it but ultimately lost, scattering the R/B Crystals and leaving their power laying dormant in the lands of Ayaka City. As revealed by Saki Mitsurugi, the legend was wrong and Grigio was the third warrior who helped them fend off Reugosite long ago.

The Beginning of Ultraman and Orb Dark's Attack
In the present day, Rosso and Blu return to protect Ayaka City from monster attacks and bonded with Minato brothers - Katsumi and Isami after rescuing them from Grigio Bone's assault. Although already having Taro and Ginga Crystals, others were added to their arsenal for Type Change and attack enhancements. The instigator of monster attacks, Makoto Aizen, made himself known and fought them by exploiting a R/B Crystal's power to become Ultraman Orb Dark. After training in the mountains and obtaining the Victory Crystal, the brothers avenge their initial defeat with Rosso's new form, Ground, while Blu delivers the finishing blow.

Battle Against Horoboros
Their next great challenge came in the form of Horoboros, who was able to deflect every finisher fired at it, despite now having the power of the Orb Ring NEO. Despite their efforts, Rosso and Blu were outmatched by the monster. Defeated, the Orb Ring NEO was taken from the brothers by Makoto Aizen, who transformed into Orb Dark once again. After Orb Dark's seeming victory against the monster, and Makoto's unleashing of Bezelb, the brothers transform again and destroy the Bezelb and prepared to fight Orb Dark, but were interrupted by the return of Horoboros, who was then evolved into its Bipedal form by Saki Mitsurugi. Horoboros managed to defeat all three Ultras before returning to its R/B Crystal. The next day, Horoboros returned and the brothers faced yet another tough battle, with all their tactics failing. They were on the losing end until Asahi arrived. She cheered them on and, hearing her prayers, the Orb Ring NEO returned itself back to the two Ultraman brothers, who used the Triple Origium Ray to finally defeat Horoboros.

The Power of Brothers Become One
After that, they were faced by a vengeful Cereza, who transformed into Grigio King via Saki's Gyro. The brothers try their best but they are unable to defeat Grigio King, exhausting all of their techniques. As a final resort, they tried to use Ultraman's and Ultraman Belial's Crystals, but to only be rejected by them.The brothers return the next day after a short recovery period, but even with a new strategy, they were unable to defeat Grigio King until Asahi reminded them of their mother's words - that when the two of them are together, they can do anything. With that, they managed to unlock the power of Ultraman's and Belial's Crystals, which allowed them to fuse into a more powerful being known as Ultraman Ruebe, who fought Grigio King and finally destroyed it.

Ultraman Hit Song History New Generation
In this music album, Rosso and Blu were recruited by Ultraman Zero to fight against Etelgar and free the New Generation Ultras from his captivity.

Stats

 * Height: 51 m
 * Weight: 43,000 t
 * Weakness: Like all Ultras, Blu is subjected to the three-minutes limit. On occasion, he will revert back to human form even when the time is not up. It also appears that, like the Riser, the R/B Gyro has to cool down before Isami can transform again.

Body Features

 * Color Timer (カラータイマー): Blu possesses a circle shaped color timer.
 * Ultra Armor: Blu has the standard silver Ultra Armor.
 * Protectors (プロテクター): Blu possess protectors on his chest that represents the element of the form he is in.

Transformation
Isami takes a R/B Crystal from the R/B Crystal Holder and flips out the middle horn of the crystal. He then inserts the crystal and the R/B Gyro opens. The Gyro is placed at chest level and the handles are pulled twice. Isami then thrusts the Gyro forward and pulls the handles one last time and places the Gyro on his chest, before transforming utilizing the elemental power of the crystal. When swapping crystals with Katsumi, instead of getting the crystal from the holder, the new crystal will appear and fall from above. The same sequence continues afterwards.

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Standard Abilities

 * Weapons


 * R/B Slugger Blu (ルーブスラッガーブル): Blu is able to summon a sword from his crest when fighting against his opponents.
 * Cross Slugger (クロススラッガー): Rosso and Blu simultaneously deliver an "X" shaped slash at the enemy, destroying them.
 * Deflection: By slashing at an incoming attack, the R/B Slugger can deflect it.
 * Energy Slash: The R/B Slugger Blu can release a blue energy slash. If it misses, it can be redirected by Rosso's R/B Slugger Rosso.
 * Energy Beam: Used in Ultraman Fusion Fight!, Blu can fire an energy beam from the tip of the R/B Slugger Blu.
 * Elemental Powers: The R/B Slugger Blu is able to channel the power of Blu's current elemental form into several abilities.
 * Sandstorm (サンドストーム): Charging his weapon with energy, Blu Wind fires an energy wave that blows away dust and sand set up by Rosso Ground's Grind Rocks.
 * R/B Crystal Powers: Using R/B Crystals, Blu can perform finishing attacks with his R/B Slugger. Their appearance/color/element seems to change with Blu's own form.
 * Wide Shot Slugger (ワイドショットスラッガー): Using the power of the Seven Crystal, Blu fires an Eye Slugger-like energy projection that cuts the target.
 * Spark Attacker (スパークアタッカー): Using the power of the X Crystal, the R/B Slugger Blu is enveloped by thunder energy. Blu then jumps up and slashes at his opponent, electrocuting them.
 * Bringer Flash (ブリンガーフラッシュ): Using the power of the Tiga Crystal, Blu forms an X made of purple energy before making one more energy arc which is sent flying to the opponent, making an energy drill.
 * Gravity Slasher (グラビティスラッシャー): Using the power of the Victory Crystal, Blu forms a 'V' made of crystals. When he impales the weapon into the ground, it breaks apart and smaller projectiles are fired.
 * Dynamite Slash (ダイナマイトスラッシュ): Using the power of the Taro Crystal, Blu launches a stream of flames at the opponent.
 * Galaxy Saber (ギャラクシーセイバー): A special attack using the power of the Ginga Crystal. It is presumably based on Ultraman Ginga's Ginga Saber.
 * Spiral Slugger (スパイラルスラッガー): A special attack using the power of the Zero Crystal.

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Trivia

 * Designer: Masayuki Goto.
 * The name of his signature Aqua Strium may have been derived from the signature finishers of the Ultras who celebrate their 45th and 20th anniversaries: Taro and Agul. Taro uses the Storium (ストリウム) Ray (it is sometimes spelled Strium as well no matter how little sense it makes) and Agul uses the Agul Stream (ストリーム), and Blu's Aqua Strium (ストリューム) may be an amalgamation of the two former beams' named. "Strium" means nothing on its own and may very well be "Stream" made to sound slightly more similar to "Storium" but without losing its overall essence.
 * When firing the Triple Origium Ray, Blu has his left hand vertical and the right horizontal, similar to Ultraman Zearth's Speshusshura Ray as opposed to the normal + style.
 * According to Makoto/Cereza's observations and analysis, Isami/Blu's stats are, as of episode 8:
 * Power: 1
 * Speed: 2
 * Defense: 1
 * Technique: 1
 * Stamina: 0
 * Finisher: 1
 * Looks: 2
 * Style: 1
 * Intelligence: 2
 * Mental: 0
 * Aura: 1
 * Mysterious: 1