You Do Need power plug adapter while traveling from Greece to United Arab Emirates (UAE).

Here is Why You Need An Adapter

The outlet and plug type used in United Arab Emirates (UAE) is G and in Greece are C and F. This is how they look like.

Greece

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

Type C

Type F

United Arab Emirates (UAE)

In United Arab Emirates (UAE), outlets of type G are in use.

Type G