Raido X/Raido Gaiden

The Raido Gaiden (カカライド・Ｘ; Viz "Raido Chronicles"; Literally meaning "The Raido Side Story")It takes places early during the Sins of the Father Arc, where Raido is thought to have vanished from the Earth never to be seen, and takes place a few years after his disappearance. The Gaiden begins right after Raido's final goodby in the Sins of the Father Arc, where Raido begins to adventure to find the grave of his missing parents who were reportted to have died in the Nine-Tails attack on the village, as well as track down the tomb of his great-grandfather Izuna Uchiha

This Arc answered many questions of Raido's past that were never fully explained within his story directly as his series starts with him as a teen.. Also dives deep into his first death as Raido Uchiha and his rebirth as Raido X, possibly explaining the real reason behind the name of the X, as well as his embrace to the neutral attitude, as well as his roots within the Uchiha

Legacy Arc

 * Dead Men Tell No Tales
 * Truth Lies Behind the Lies
 * The Unmarked Paths
 * Bloodline of Izuna Uchiha
 * Saṃsāra Eye