Rust Jigsaw (ラスト・ジグソー, Rasuto Jigusō; ; ; ) is a mysterious Burst Linker who is a member of the Acceleration Research Society.
Flight Towards the Blue Sky ArcMain article: Flight Towards the Blue Sky ArcEdit
Rust Jigsaw appeared when Silver Crow and Blood Leopard signed up for a tag match. Rust attempted to quickly dispatch the two with the use of his various saws, but thanks to Blood Leopard, he was defeated. Due to Blood Leopards final attack on his avatar, he had a lingering pain in his right shoulder/neck region. Haru tried to follow Rust in the real world, but was cut off. Much later, Rust's actions when trying to get out of the match cafe would help Haru figure out how Seiji Noumi was keeping his name from the matching list.
Rust Jigsaw's abilities primarially revolve around saws. His primary method of attack is firing a circular saw at his opponents from long range. He also has an ability which allows him place razor tripwires around a certain area, allowing him to quickly dispatch close range foes.
He also has an Incarnate System ability, which he can forcibly boost using his BIC to greatly increase its range. He can corrode any avatar within range of his ability, which is used taking advantage of the fact that during the Hermes Cord race the Gallery has HP gauges, albeit locked, to damage them to cause chaos.