You can also add these new characters. You can add only one new character. Please inform the new character code with your choice of type and letters. Please use the bracket symbol so I can distinguish the character code (e.g. no.2 san-serif style: Kay(NE2) -> Kay♥︎). 

If you want no.1 serif style and new characters combination, new characters won’t stamped as deeply as no.1 serif style since the new characters has shorter height than no.1 serif style. No.2 san-serif style and new characters have same height so it will stamped with same pressure.