I would just like to comment, that this is one of the sweetest most utterly adorable comics I have come across in ages. It best exemplifies the loving tenderness that siblings have for one another.
Love and kindness. That is the answer. That is the way. Try to practice that each and everyday.
Some may see that as a load of pollyanna sentiment. I say, those are the ones who have never actually practiced any love and kindness, whatsoever.