Dragon Ball Z artist opens up about the nightmarish experience of bringing Perfect Cell to life, which even the late Akira Toriyama regretted.

Regulatory T cells police the immune system, making sure that killer T cells coming back from battling pathogens transition into a resting state, but still prepared to fight if the pathogen returns.

Dragon Ball's animator admits who is the most frustrating character to draw and it is one of the most popular villains, Cell.