You Do Need power plug adapter while traveling from Saint Kitts and Nevis to Ukraine.

Here is Why You Need An Adapter

The outlet and plug type used in Ukraine are C and F and in Saint Kitts and Nevis are D and G. This is how they look like.

Saint Kitts and Nevis

In Saint Kitts and Nevis, outlets of type D and G are in use.

Type D

Type G

Ukraine

In Ukraine, outlets of type C and F are in use.

Type C

Type F