Loto is an Ultra Warrior from Planet U40, where the inhabitants look like humans, but they are able to transform using an energy called the Ultra Mind.

One of the Great 8, the eight greatest warriors of U40 who can take on a giant size, Loto was one of the most respected warriors of his planet. During the Hellar Conflict, he and his brothers lead the charge against the exiled natives of U40.

Loto's human form places his Beam Flasher on his forehead and transforms; along with Elek's human form, the transformation is just like Ultraman Joneus' transformation.