Rosy the Rascal

Anti-Amy Rose, also known as "Rosy the Rascal,", is the Anti Mobius counterpart to Amy Rose. Rosy wears the same outfit Amy wore when she was younger and carries a hammer similar to Amy's, except it's green and has spikes on it at either end.

Increase in Age
Rosy and Amy both share similar historical scenarios. Like Amy, Anti Amy used a special ring, (it is unknown if it was the Anti-Mobius version of the Ring of Acorns or not) to make herself older so that Scourge would like her. However, the jolt of energy from the magic ring made Rosy go insane. (StH: #79, #193)

Sought out by Sonic and Amy
Amy lurks the Castle Acorn in Moebius, waiting for Scourge to come back to her. Apparently, Rosy used to like Scourge, but since he was so mean to her, Rosy turned on Scourge. It is unknown if she still loves him or not, but as Dr. Kintobor pointed out, she "HATES" Scourge. Sonic the Hedgehog and Amy, with the help of Buns Rabbot, attempted to recruit her to help defeat Scourge and his Suppression Squad, who had recently invaded Freedom HQ in Mobius Prime. When asked for her help, Anti Amy went insane and began attacking the trio with her hammer. (StH: #79, #193)

Personality
Because of her transformation, Rosy has gone insane and "breaks" things, mainly people it appears. She used to like Scourge but now stalks him after he was mean and ignored her. She also appears to enjoy singing little songs about what she'll do to people. (StH: #193)