R6 was first owned by Asana's great-grandfather, who often took Asana for rides in it when she was young. They once rescued Chevelle Kayama and Trapigeon using it. Asana later inherited R6 herself. Following the acquisition of Mutsuba Heavy Machinery by the Goha Corporation, the production of Heavy Cavalry components was phased out and Asana's refusal to use other parts resulted in R6's slow deterioration.
R6 broke down in the forest on the outskirts of Goha City due to a loose circuit, which was fixed by Yuga Ohdo. As thanks, Asana taught Yuga to operate R6, spending the afternoon with him. Asana used R6 while discovering the Dark Rush Duel Tournament, holding a moment of silence when she believed it wished to speak, and she Dueled atop it during her Rush Duel with Yuga.
While she was cleaning R6 one day, Asana discovered a damaged panel on the Heavy Cavalry and bandaged it tenderly, reassuring R6 that she would replace the damaged area. Asana took R6 to the Mutsuba mine to pursue Yuga and his friends, and she Dueled atop R6 during her second Rush Duel with Yuga, asking it to hold on a little longer. When Asana's "Wurm Ex-Cavator the Heavy Mequestrian Wyrm" clashed with Yuga's "Super Magitek Deity Magnum Over Road", R6 was damaged by the battle. R6 continued to break down during the Duel, and despite the efforts of the Heavy Cavalry Duel Club to hold it together and maintain it, R6 was destroyed by the Duel. Afterwards Yuga revealed R0, the Mutsuba Style Mobile Duel Device that had been modified over the course of its construction and convinced Asana that modifications were acceptable, and she allowed him to rebuild R6 using other parts.
R6 is a model of the easy to use but extremely powerful "R" series of Heavy Cavalry. With a Duel Disk included, it's quite useful in multi purpose, and its ease of maintenance makes it extremely popular among the Mutsuba Heavy Machinery Customer Base. R6's Duel Disk is built into its bucket, which also contains its Solid Vision projectors.
Asana herself treats R6 as a living machine, a courtesy afforded to it by the rest of the Heavy Cavalry Duel Club and Yuga Ohdo, and R6 appears to respond in kind by rumbling its engine. She reacts to finding damage on it as if it was a wound, bandaging it in the manner one would treat a cut.
- Yu-Gi-Oh! SEVENS episode 32: "The Lady Who Loved Heavy Cavalry"
- Yu-Gi-Oh! SEVENS episode 37: "Coo-Coo-Luke-Coo"
- Yu-Gi-Oh! SEVENS episode 39: "Bring it Back! Mutsuba's Pride!"
- Yu-Gi-Oh! SEVENS episode 28: "Training Camp! Sushi Duel"
- Yu-Gi-Oh! SEVENS episode 36: "Enlightenment ♡ Ranze Eyes"
- Yu-Gi-Oh! SEVENS episode 38: "Unearth the Maximum!"
- Yu-Gi-Oh! SEVENS character profiles on TV Tokyo's website