I have a SpriteFont in XNA, which has the standard 126 characters that are usable.
However i would like to use the "ಠ" symbol in the game.
So is there anyway of adding just a few more symbols that the spritefont accepts?
Modify the sprite font file. It's XML. Double click it in Visual Studio.
Towards the bottom of the default file is a the following:
Your character is unicode code point U+0CA0, which in decimal is 3232. So add another character region tag that contains it:
This assumes that the ಠ symbol exists in the font you are using.