Reigon (or Legion, aka Ghost of Himika) was the 48th monster of the week by order of Appearance to be featured in Ep.41 of the Jeeg Anime; the Robot Beast had the form of a lion with the interesting featured its face and colors evoke those of the late Queen Himika and was, ironically, possessed by her Soul when she was brought back in a ritual carried out by Amaso and Ikima.

Normally, Reigon did not had abilities besides a Laser Beam from the horn on the forehead. It Had a yellow mane, a Black torso, with Light Yellow Shoulders, Lower purple legs, a purple abdomen with green rivets, a light yellow pelvis and black tail. Its face resembles Himika's.

However, when possessed by her, it's features change and abilities are increase; it developed a humanoid form (likely NOT part of the actual design, as Flora was shocked by the Transformation); it possessed paralyzing Optic beam as well created a pocket Dimension (an Illusion really), where she could conjure up the Spirits of the Dead Haniwa Phantoms, and was able to fade in and out to avoid direct hits. Her horn became smaller and developed the small face seen on top of Himika's head.

While Hiroshi and Team Jeeg enjoyed a time of peace in their vacation on the Lake (briefly interrupted by a premonition from Mayumi), in Jamatai, Ikima and Amaso were carrying out a ritual in front of the statue of the late Queen Himika, when Flora is sent out on the mission with the Lion Robot Beast Reigon; a beam of light is fired from the statue on to the beast and the Monster transforms into a Humanoid form, shocking Flora. Himika reveals herself and departs with Ikima and Amaso on the Orochi to seek revenge on Jeeg, but promising the same to Dragon – killing Robot Soldiers on her way. Flora reports the development but the Emperor allows it for his means, but will give the finishing blow.

Orochi is detected and it lands, Himika/Reigon comes out and the ship hides. As the new Beast its on its way, Hiroshi and the group are warn and they set off to face it – when they meet, he is shock to learn its Himika's Soul operating the Monster, and he transforms and assemble Jeeg. He tries to take her down with Knuckle Bombers, but she fades in and out; Himika then fires a paralyzing optic beam that knocks Jeeg and the Shooter (taking the latter down); Himika then, with her powers, creates a pocket dimension, the Graveyard of the Other world, where she conjures up the souls of some of the Dead Haniwa Phantoms (among them Numenos, Baika, Daima, Tsubuke, Gyao and Garosu); they all gang up on Jeeg, the Mecha unable to use its powers in the Graveyard, is beaten and later chained.

MechaDon2 arrives (with a kendama as a weapon) and sees the Black fog, and explores it, finding Jeeg and Reigon – it tries to defeat the Monster, but is blasted to pieces and out of the Graveyard. As she blast the Robot, Computer Father contacts Jeeg, telling him her Dimension is an illusion created by Ultrasonic Waves – Pantheroid is launch to provide assistance, distracting Himika and Freeing Jeeg, continuing their battle; Meanwhile, Emperor Dragon arrives on his Flag Ship (The Dragon Fortress) and attacks the Build Base. Hiroshi is inform of the situation, uses Spin Storm, blasting the Head of Reigon when Himika was distracted by Pantheroid; The Body still functioning leaps in one last charge, when Jeeg fires Knuckle Bombers, destroying the remainder of the Monster and sending Himika back to the Other World once more. Jeeg then reassembles in Sky Parts, and with Big Shooter attack Dragon's Flag ship – Orochi arrives to save Dragon and the villains escape.

Later, realizing of Dragon's direct intervention in the Front lines is the warning of a decisive Battle, Hiroshi vows to defeat him.