User blog comment:IamJakuhoRaikoben/Chapter 497: The Winter Mage, Review./@comment-73.191.17.103-20160818134854/@comment-7418318-20160818163127

He beat her up ONCE as part of an assignment and regretted it ever since. Not to mention that at the time they were enemies.

Rukia and Sakura on the other hand (especially Sakura) did it repeatedly to good friends and certainly never showed the slightest sign of regret for it.