Clever
Wise
Your servant uses a stool to break open shellfish. This is really clever, because shucking shellfish is a lot of work. It's also a wise move, because it'll save him time that he can spend on all his other servant chores.
けん
かしこ
None
"Yes, more clever than you!" he yells, tearing off his servant's disguise. "It is I, Ken (けん) the samurai. I won't let you eat these shellfish. I'm taking them back to the sea, where they belong!"