Arc 2The Blood Pool and Zero
Simu helped Shiraishi Mori gain the strength to avenge his parents and village, then upgraded his own abilities and confronted Orochimaru’s experiments. The arc left Simu studying Natural Energy after rescuing Zero from Hidan’s ritual.
- Simu gave Shiraishi Mori a Kagune, and Mori fought through Sakamoto’s arena to reunite with his parents as Ghouls and ninjas clashed.
- Keiko and Shiraishi Ao died protecting Mori, who took multiple Kagune, defeated Sakamoto, and reached Shuiyu Village too late to stop the attack on his grandfather.
- Mori transformed into a monstrous insect dragon and devastated the village, but Shiraishi Rin’s presence brought him back to himself.
- Mori gathered the surviving Ghouls, took responsibility for the damage he caused, and called on them to drive Yugakure’s nobles and ninjas from the world.
- The Cult Leader took over Simu’s body, but Hidan killed him and slaughtered the cultists before Simu emerged from the Blood Pool and faced Orochimaru.
- Simu fought Orochimaru’s apparent clone, developed new abilities from his research, and modified Hidan before the two set out for Orochimaru’s hidden base.
- Simu and Hidan entered the base, fought its guards, and found a laboratory full of human test subjects, including Test Subject Zero, an Uzumaki girl studied for her ability to withstand Natural Energy.
- Hidan’s mistake released Zero and transformed her into a monster, but Simu stopped his ritual and restrained her before Natural Energy began petrifying Simu’s hand, forcing him to sever it.