[6] Movie producer Junya Okabe stated that Zero's involvement in Mega Monster Battle: Ultra Galaxy was to invoke the elements of a parent-child relationship.

[7] The setting of Zero as Leo's pupil was made under suggestion of director Koichi Sakamoto incorporating elements of his favorite Kung fu films.

[11][12] In Ultraman Saga, a comical plot was suggested to the character as a new element and Zero's 5 meter-transformation is based on proposal made by VFX producer as part of an Ultra Warrior's relationship with humanity.

[13] Series main writer Otsuichi was dubious of Zero's involvement as part of the cast of Ultraman Geed, believing that he is a poor character but director Sakamoto managed to expand him by forming a senior-junior pair with the titular Ultra.

[14] Realizing that he is a powerful character, the director decided to include the destruction of Ultimate Bracelet as a handicap to Zero, which makes him all the more similar to Dan Moroboshi's situation in Ultraman Leo.

[19] It was originally structured to fit the suit actor tightly in hopes of preventing wrinkles but was loosen a bit to increase mobility in Zero's actions.

[8] Because of the finalized design of Zero's head turned out to be different, his Zero Sluggers were forced to be redesigned after the first filming of Mega Monster Battle: Ultra Galaxy, thus making it bigger than the intended size.

[21] Designs of other forms were as follows: Yuji Kobayashi revealed that the reason he named the character as "Zero" is to symbolize the "restart of Ultraman story from scratch".

During his time training under Ultraman Leo, Zero was forced to wear the Tector Gear armor that limited his movements and strength and befriended a Pigmon.

Seven's Eye Slugger then landed at the training ground, Leo realized that Seven was calling for Zero's help against Belial at the Monster Graveyard, and King removed the locks on Zero's Tector Gear.

He was given the Ultra Zero Bracelet by Ultraseven, which allowed him to transform three times in an alternate dimension and received help from residents of the Land of Light during the travel.

Upon arrival, he fought against Legionoid armies on the Planet Anu and bonded with a local police miner named Run in order to save his life.

With Belial's army approaching and the Planet of Mirrors shattering, Run saved Nao and Emerana at the cost of being captured and had his Ultra Zero Eye separated.

[28] Zero still continued with his mission to wipe out the remnants of Belial's army and at that time, he was called into another Planet Earth by Shin Asuka/Ultraman Dyna, sensing a new threat in a form of Alien Bat.

In that world, he discovered that the Earth's populations had mysteriously vanished and also fused with a dimensional-displaced Super GUTS member named Nozomu Taiga.

Zero tend to act as the straight man to Taiga's antics and because of their lack of cooperation, Zero was incapable of summoning his full power, only appearing as a 5 m tall version of himself during their first transformation.

In Ultraman Saga Super Complete Works magazine, Zero was mentioned to have visited the alternate Earth once more, with Anna of Team U wrote his arrival in her diary.

The act greatly exhausted him and was unable to recall earlier incidents but in the end joined his comrades in returning home as they tried to pick a new name for Pigmon.

[31] In the epilogue, it was revealed that Zero unknowingly resurrect Belial and Jathar from their deaths, the latter being his first kill in the second part of series in hopes of restoring the Ultimate Force Zero from their bronze petrifaction.

[77] His finisher is the Wide Zero Shot (ワイドゼロショット, Waido Zero Shotto), which is performed in his master's pre-fighting stance before shifting to the "L"-style beam attack used by Ultraseven.

During the 15 year anniversary of Asuka's sacrifice, Taiga participated in an aerial combat against a troop of leftover Sphires whom tried to attack the Mars Colony.

During one of Geed's fights, Leito died getting hit by a truck while attempting to save a Little Star holder named Toru Honda from being crushed by debris.

While originally preferring to watch Geed's battles from afar, his body occasionally taken by the impatient Zero and is forced to participate and assist the young warrior.

[49] During Zero's death at the hands of Galactron, Leito harbors a huge remorse for being helpless during that time until his new resolve allowed Zero to be revived and obtain the Riser to utilize Ultraman Zero Beyond.

[48] Leito (as Zero's host) being the father of a family is made under suggestion by writer Otsuichi as a contrast to Riku Asakura/Ultraman Geed's relation to Belial.

[14] Ozawa was taught by suit actor Hideyoshi Iwata of Zero's fighting skills to portray Zero when Leito was under his possession, and thus his performance was commended by director Sakamoto.

He is also impressed by how Zero's design armed with two Eye Sluggers and that the Ultra Warrior's fighting skill involves speed and space martial arts movements.

The post itself is a joke to a popular anime series, Puella Magi Madoka Magica which featured the main antagonist Kyubey manipulating girls (including the main characters of that series) into a magical girl and had become viral in the Japanese fandom ever since, creating a strings of internet meme that featured Zero facing Kyubey.