If you go to “Appearance -> Theme settings -> Design -> Title font” you can set a font for your titles. These fonts (except for the Junction font) are loaded from the google font library. We’ve only listed the fonts that we think look well with the theme. To view this library you can go here: https://www.google.com/fonts. This way you can check if the font you pick has the required characters.
Hope this helps 🙂