Charlie is a highly intelligent mobian that spent most of her childhood feeling isolated. Her parents openly admitted many times that she was a bastard, completely unplanned, and very much unwanted. She was incredibly smart and beautiful, attracting many potential friends and secret admirers...but she quickly scared most of them off, due to the fact that she had absolutely no idea how to talk or treat others. Charlie only made friends with two other mobians - Wrath and Peanut. Charlie and Wrath were basically inseparable, with both mobians visiting eachother frequently. That came to an end rather quickly, though, due to an attack that happened while he was working - Wrath was kidnapped during a raid and she hasn't seen him since. Instead of mourning, she completely submerged herself in work and science expriments in an attempt to forget about the life partner she had just lost. Charlie forgot about Wrath and quickly reverted back to how she was as a child - bitter and alone. Her empathy and care for others took a huge nosedive.

She moved away from her parents and set out to work in a lab completely isolated from everybody else. She hired a helper (Raid) and worked her way into Doctor Eggman's inner circle by kidnapping and presenting a kidnapped Tails "Miles" Prowler in exchange for full access to his lab facilities. He accepted her offer, and employed her as the head scientist for Eggman Enterprises. Charlie doesn't really care about the job title or what he thinks- she just wants to work on her projects far, far away from everybody else. What better place to do that than a secret lair hidden thousands of miles away from the nearest city?

Charlie puts on a cute and bubbly act in order to appeal and appease Doctor Eggman, but behind doors she is highly reserved and extremely cold towards others. She is highly focused on her work and takes pride in being independent, organized, and precise. Wouldn't enjoy outings or gatherings with a big group. LOVES Eggman's robot personnel (Cubot, Orbot, and Metal Sonic). Although generally curt and slightly hard-hearted, she treats Raid decently and never asks the impossible from him. Charlie secretly likes having Raid around...having him come in once or twice to deliver something/be annoying fills up her daily "mobian interaction" quota. Really, really misses Wrath but would probably have a meltdown if she ever reconnected with/saw him again.