No... "@Miss_A2" is @Pig_Larkcape1. Ever wonder why he didn't come back? Now you know... （︶^︶）
Anyways, my guess is that he tried to pass off as "Ariella", but @Anakin_Steamwalker or whoever moderates the names made him "A2" (or... "Ariella2") in order to prevent confusion. It makes sense when you think about it, remember how "she" tried to make her role-play name Ariella?
So yeah, now you know.