Hi Clair,
You’re right that the arrows should be styled consistently and, in my own set up of Ryu, the arrows appear the same across the blog page and individual posts.
The reason the arrows aren’t styled in a consistent way on your blog page is due to the fact that quotes around the class names are duplicated here:
<span class="“meta-nav”">←</span>
<span class="“text-nav”">Older posts</span>
Did you edit the above code via your child theme? If so, can you please remove the duplicate quotes? The code should look as follows:
<span class="meta-nav">←</span>
<span class="text-nav">Older posts</span>
Thanks!