It's there already.
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<title>Re: Keeping an eye on Opera</title>
<link>https://dndsanctuary.eu/index.php?topic=13.msg76107#msg76107</link>
<description>
<![CDATA[Well, yes, looks like complete posts now. So you can tweak them, amazing!<br /><br />Now, how about adding the poster information too to each post in the RSS feed. Just the name. Can Elk do that? <img src="https://dndsanctuary.eu/smileys/myopera/smile.gif" alt=":)" title="Smiley" class="smiley" /><br />]]>
</description>
<category><![CDATA[Browsers & Technology]]></category>
<comments>https://dndsanctuary.eu/index.php?action=post;topic=13.0</comments>
<pubDate>Fri, 27 Oct 2017 20:56:29 GMT</pubDate>
<guid>https://dndsanctuary.eu/index.php?topic=13.msg76107#msg76107</guid>
<dc:creator>ersi</dc:creator>
</item>
That's pretty standard. What are you using to look at the feed?