HTML code in Slider Title

my client want the registered trade mark next to their name. When I put it in the slider title - the trademark becomes full size. When I use the html code in the title <sup> </sup> to change it - the title shows the code.
Is there anyway around this?

website is:

You cannot add html in the slide title, what you can do is use a custom CSS plugin or child theme and add this code:

.slide-text li:nth-of-type(2) .maintitle:before {
	content: "®";
	font-size: 20px;
	position: absolute;
	right: -20px;
        top: -10px;