People keep asking what Jacob would do if someone hurt Nini. Would he even care?
Yes he would.
For those few who don't know, kappas are said to have a bowl on their head filled with water, and if they meet them you should take a deep bow for them because they will bow back and the water will spill out, making them lose their strength.
A less known part of kappa folklore is that samurai are their worst enemy, because they tend to trick or kill kappas when they see them.