My $20 Petco mystery wrasse turned out to be a stunning Whip Fin Fairy (Cirrhilabrus filamentosus). He was a tremendous bully at first. He mellowed out a good bit when I got my big blonde Naso and yellow tangs. He really came into his own when I got a melenarus wrasse. After the initial adjustment period, they settled in pretty well, a bit snarky with each other from time to time but they seem to like to “play chase” with each other, weaving through the rocks, etc. The bonus was that once there was another wrasse in the tank, my fairy finally decided it was time to start flashing (red body, bright yellow top and bottom fins with an electric blue tail.)
He is still a brat and chases the chromis several times a day. I WOULD be very cautious about adding another slower, more peaceful fish at this point unless it was good a escaping into small crevices and caves like an engineer goby or a lawnmower blenny.