You Do Need power plug adapter while traveling from Rwanda to Ireland (Eire).

Here is Why You Need An Adapter

The outlet and plug type used in Ireland (Eire) is G and in Rwanda are C, E, F and G. This is how they look like.

Rwanda

In Rwanda, outlets of type C, E, F and G are in use.

Type C

Type E

Type F

Type G

Ireland (Eire)

In Ireland (Eire), outlets of type G are in use.

Type G