Youtube user Haxxy, with help from YuniWii, has made two Krystal character mods for Grand Theft Auto: San Andreas, though it might only work on the Android version. There aren't any instructions or guarantees with these mods, so try them at your own risk. There's both an Adventures version and Assault version available for download. He's made several other trailers and gameplay videos for this mod. Check them out on his channel.