Multi knife / kichen accessories

Various knives those take up the kitchen now live together in one house.
Three knives which are divided by use sometimes hide themselves and become one or coexistence.
When they are together, they become one knife, when they are divided, they are also good friends, who do its own duty.
Onion knife seems as one, like clearness that we can feel when we pill onion, however the knife becomes various kinds of knives.