Schema Collection Page h/t http://www.seoskeptic.com/how-to-use-schema-org-v2-0s-mainentityofpage-property/

collection-page.html

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "CollectionPage",
  "name": "Page Title",
  "url": "URL of Page",
  "description": "Meta Description",
  "mainEntity": {
    "@type": "ItemList",
    "itemListElement": [
      {
        "@type": "PerformanceRole",
        "characterName": "Character Name",
        "mainEntityofPage": "URL of Character Page"
      },
        {
        "@type": "PerformanceRole",
        "name": "Character Name",
        "mainEntityofPage": "URL of Character Page"
      },
         {
        "@type": "PerformanceRole",
        "name": "Character Name",
        "mainEntityofPage": "URL of Character Page"
      }
    ]
  }
}
</script>