C.R.O.A.K.

Three of our friends all got a place together a while back.

Since then a few more friends have come and gone through the apartment.

The first three friends initials were O. R. K., which sounds like Orc, or course.

Then another friend came along: C.

And a year later, yet another friend moved in: A.

So, with all of those initials, I've come up with C.R.O.A.K. - A frog orc.