[ Maybe...he feels a little guilty for the AI being collateral damage. Just a little. Developing empathy has been quite a nuisance to Berserker -- now he cares about his actions having consequences, at least to some degree and for certain people. Kotomine's unfortunate role in life means he falls into one of those categories...annoying. ]

...You should go to the infirmary, at least to let them look you over. Or don't. See what life is like with a concussion. It's a new experience for you.

[ Anyway... ]

Getting used to a mortal body is annoying. Scars and healing time...I can't just use my Rune Magic to heal wounds as they happen anymore. The healing magic here isn't anywhere near that level.