Sonia is the daughter of Sonic and Amy Rose. She has light blue fur and green eyes. She owns a female Giaorugu named Geodeteeth.
Bold and fearless, Sonia is a proactive go-getter that goes after what she wants and lets nothing get in her way. As early as the first time she met the Allstar Rangers, Sonia was shown to possess a proactive streak. When she had just been introduced, she made her way to Raiden and instantly asked to join the team, running around in circles in excitement. Likewise, she is an intuitive activist, which usually means she acts before thinking things through. Sonia is also a tomboy, having little interest in most girly things, calling dolls and rocking horses as creepy and possessed. Sonia also believes in equalit, stating "Angels and Demons protect us" when her friends were referring to most of the monsters on the team as demons.