Created with genN8's furry doll maker; Sonic Gender Bending!
Based on Archie's universe, incase you're not familiar with the characters, here's a list;
Crystal-Le(Knuckles): Knuckle's grandmother is named Crystal-La. His mother's name is Lara-Le. In this case the name 'crystal' is also a play on the fact that Knuckles is infused with Chaos energy from the master emerald- a giant gem/crystal.
Here's the original if anyone else wants to try it;[link]
Olga "Sonic"(Duh): Sonic's real name in Archie's universe is Olglvie Maurice Hedgehog. Suffice to say that the female version of this name is Olga.
Mylie "Tails"(Yeah, no kidding): Mylie=Miles. Nuff said.
Elia Acorn(Prince Elias): Sally's long lost brother. A more feminine sounding version of the name.
Umbra(Shadow): Umbra is the darkest part of a shadow. The name itself seemed more feminine.
Espia(Espio): Once again, simply a more feminine version of Espio's name, since most male names ending in 'o' can be made female by changing the 'O' into an 'A'.
This is merely my rendition and others may see a differing opinion as to what these characters may look like. If it inspires your own deviation, that's fine. But please do not use your work to criticize mine.