You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="Bael|3708" />
  </query-continue>
  <query>
    <pages>
      <page pageid="42" ns="0" title="Rias Gremory" />
      <page pageid="43" ns="0" title="Diabeł" />
      <page pageid="229" ns="0" title="Moc Zniszczenia" />
      <page pageid="2207" ns="0" title="Venelana Gremory" />
      <page pageid="2298" ns="0" title="Sairaorg Bael" />
      <page pageid="2314" ns="0" title="Inne postaci" />
      <page pageid="2477" ns="0" title="Misla Bael" />
      <page pageid="2502" ns="0" title="Gremory" />
      <page pageid="2778" ns="0" title="Zekram Bael" />
      <page pageid="3707" ns="0" title="Magdaran Bael" />
    </pages>
  </query>
</api>