Chapter 344 I Dunno, Why Don’t You Guys Think of One?
Kat tilted her head "Well, yeah it only happens when I'm basically empty but it's really the only thing stopping me from running forever, my energy. I don't sweat anymore or really get hot or even tired outside of mental fatigue."
"Hmm" murmured Uncle
"OOOh, I know!" said Kamiko, putting as much enthusiasm as she could into her words while still clearly trying to catch her breath. Taking a little longer to fully calm her breathing, she continued. "I think that it's actually Kat's special regeneration. My bet is that for some reason it thinks that being tired is something to be healed which burns a bit of energy to keep Kat in perfect condition. Most regen only heals skin and muscle, and some can also do bone, but Kat's seems to just do whatever it wants"
Kat nodded. "That actually makes a lot of sense. It's still a little weird but it makes sense"