Ryan1429 is a replica of Giyu Tomioka's sword from the manga series Demon Slayer: Kimetsu no Yaiba. In the series, demon slayer corps is a group of skilled swordfighters who protect the people from demons. Giyu Tomioka is a high-ranking demon slayer who wields a Nichirin blade, made from a special ore that absorbs sunlight and made for killing demons.

The blade of Ryan1429 is made of through-hardened 1095 high carbon steel with a shinogi zukuri geometry and without bohi. The shinogi-ji is painted with black while the hira-ji is painted in blue. The saya is made of hardwood with glossy black paint and has metal koiguchi and kojiri. The tsuba, fuchi and kashira are made of alloy. The tsuka has real rayskin panels with a white, leather ito wrapped in hinerimaki style. On the blade near the habaki is etched a kanji which means "Destroy all demons".