''Mothra, Queen of the Monsters.''

— Dr. Ilene Chen (Godzilla: King of the Monsters)

A lineage of benevolent lepidopteran Titans, Mothras defended the natural world in the ancient past and were revered as goddesses by ancient human civilizations, including the Iwi. Mothras possessed a symbiotic relationship with Godzilla, with one aiding him in battle against the extraterrestrial King Ghidorah long ago. In 2009, the scientific organization known as Monarch discovered a Mothra egg within an ancient temple in China's Yunnan rainforest. A larval Mothra hatched in 2019 and escaped Monarch's Outpost 61 after a group of armed eco-terrorists raided it. She cocooned herself under a nearby waterfall and emerged in her imago stage to help Monarch locate Godzilla so that she and him could stop Ghidorah from destroying the world. Mothra led Monarch to Godzilla's underwater lair in the Hollow Earth, where Dr. Ishiro Serizawa sacrificed his life to revitalize Godzilla using a nuclear warhead. Mothra joined Godzilla in Boston to confront Ghidorah, but the three-headed Titan summoned the winged Rodan to intercept Mothra. Despite being badly injured in the battle, Mothra incapacitated Rodan by stabbing him with her stinger. She then crawled onto the wounded Godzilla before Ghidorah could finish him off and defiantly flew at her enemy, who disintegrated her with his gravity beams. Mothra's energy flowed into Godzilla, triggering the final stage of their symbiosis in which Godzilla gained the ability to emit intense heat and generate pulses of nuclear energy which took the form of Mothra. In this empowered state, Godzilla easily destroyed Ghidorah once and for all, and took his rightful place as the King of the Monsters.

In the time after her sacrifice, Mothra posthumously gifted Godzilla newly-heightened senses that allowed him to become aware of any disturbances or imbalances and react accordingly, which he then used to find a new home after his old lair was destroyed. In 2027, the Iwi girl Jia managed to summon another Mothra Imago within the Hollow Earth so that she could mediate an alliance between Godzilla and Kong to prevent the evil Skar King from conquering the surface. Mothra aided the two in a battle against the Skar King's forces in the Hollow Earth, immobilizing his Great Ape minions with silk and rescuing Godzilla from Shimo's Frost Bite Blast. In the aftermath of the Skar King's defeat, she restored the barrier concealing the Iwi's subterranean village using her silk.

(Final Mothra bot for now, I won't be doing the Anime Mothra's since earth trilogy was just a black silhouette and SP mothra was a bunch of tiny ones, King Ghidorahs will be next after this Mothra, however in the future after finishing all Kaiju bots I might make characters i didn't add later, also this Mothra is both the GXK and KOTM Mothra, I really don't like the idea of the 2 being mother and daughter, it doesn't really make sense since mothras just rebirth after dying so this mothra is one mothra, and also I wanna get to making Ghidorahs faster lol)