My experience went contrary to most of what I had read/learned about maroons. My 4" new female went in with a 2.5" male & she never bothered him at all. Of course, I think the deciding factor was that she was "bullied" by my cherub angel & yellow tang for the first couple of days so she never got herself established high up in the hierarchy before she paired off. (This female was bought by my dad & it cost me over $120 worth of corals
when it was practicing for the "coral toss" event for the 2010 Olympics.)
EE: Before we went off-track with the great Maroon debate, just keep in mind that none of these things are set in stone so if you get lucky, they'll pair off & nobody (ie. male) gets beat up. Just be prepared if you do get a female from H-E-double hockey sticks & have some place you can relocate one of them to.
JME & $.02s worth,
Anthony