What Happened to Carlos in Descendants-4 Cameron Boyce's Character Departure Explained

he only mention in Descendants: Rise of Red is right at the beginning, during a conversation between Uma (who just became the Principal of Auradon Prep) and the former-head Fairy Godmother.
When Fairy Godmother is concerned about opening Auradon Prep to all VKs, meaning including those from Wonderland, Uma, looking at a photo of Cameron Boyce's character, reminds her that "It's what Carlos would have wanted."
She adds, "So don't do it for me. Do it in honor of him." And that seals the deal.
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