- The fact that the sixteen ninjas' friendship transcended lifetimes, and that most of them were friends already.
- Tsunade considers Chopper her son, and won't leave Drum Island without him.
- Doubles as Tear Jerker. Sai's last request to his granddaughter is that should she ever meet the reincarnations of the sixteen ninjas, who were his first and closest friends until their deaths, that she'd tell them about how he lived his life.
Heartwarming / Souls Reborn