The spray bottle! I can just imagine Kakashi going "Down, you three!" *squirt squirt* *angry children yowling like cats*
All I can manage to picture is Kakashi pulling off flashy fancy ninja moves and Mitsuki, Sarada, Boruto, and Rogu brace for a jutsu and
*squirt squirt squirt*
They’re so offended. Revenge is the only thing that matters anymore.