Pietra and Mana Chromia are Plusle and Minun Twins that serve their mistress Krystal. The Use their Positive and Negative Energies to Attract People to them and take them to their mistress for Conversions. So if you see a Pair of plusle and Minun Twins at the Local Club. I Advise to stay away, unless you want to be a Love slave.

Pietra and Mana Chromia © to me