Cell Activation[1] is the Quirk used by Katsuma Shimano and Nine, who stole it from Katsuma's father.
Description#
Cell Activation allows its user to activate the cells in their body or another person's body through touch. This greatly increases regeneration, reduces recovery time, and can even improve physical condition.
Weaknesses#
Cell Activation drains the user's stamina when activated, and continued usage can cause fatigue. The Quirk also can't be activated on certain people depending on their blood type, although Katsuma's version of the Quirk didn't seem to have this drawback.
The Quirk only heals individuals if the user is making physical contact to do so. It also is rather slow as Katsuma had to maintain his physical contact on Izuku and Katsuki to fully recover both of them for an extended period of time.
Usage#
Katsuma Shimano#
Katsuma is able to activate and speed up the activity of cells in the body of anyone he touches, and it is implied he can use it on himself.
This Quirk was used on Izuku and Katsuki after their first battle with Nine, and Katsuma was able to heal their wounds, speed up their recovery, and improve their physical performance. After prolonged usage during that treatment, Katsuma became exhausted. His Quirk has been shown to work on people with Type O, A, and is stated by Nine to be compatible with Type B blood.
Mr. Shimano#
Katsuma's father is able to activate the cells in his own body or another person's body and is able to heal wounds and speed up recovery time.
He stated that his version of the Quirk can only be used on those with Type A blood.
Nine#
Nine stole this Quirk from Katsuma's father, but was unable to use it on himself due to the Quirk being incompatible with his own Type B blood.
Trivia#
- Cell Activation is the first named Quirk to be stolen onscreen by an All For One user.