The Crystal Guardian

The Crystal Guardian (or TCG for short) is the main antagonist of the series, he was first seen in Ep.2 - "How Garmatrol got his Cursed Arm", and officially introduced in the modern world in Ep.5 - "Quest for Answers - PART 2". His goal is to end all life, even if that means it will end his too.

He is the greatest menace in the universe, and was locked in the Cosmic Prison for a while, until in Ep.9 - "The Meeting" where he finally escaped from it.

He was Garmatrol's master, but they stopped being partners after Garmatrol betrayed him.

Personality
He's shown to have no care or concern to anything, as he obliterates worlds daily like it's nothing, but he still helped Garmatrol to get a new sword just so he can be a more useful tool to him in Ep.2 - "How Garmatrol got his Cursed Arm".

Very recently, he was put in the Cosmic Prison for the supervillains, having a special base of his own at the prison's core, where no one besides Ben knows where he is.

Appearances

 * Ep.1 - "How OkiWan met Garmatrol" (voice)
 * Ep.2 - "How Garmatrol got his Cursed Arm"
 * Ep.5 - "Quest for Answers - PART 2" (cameo)
 * Ep.6 - "One More Thing"  (nightmare)
 * Ep.9 - "The Meeting" (nightmare, mentioned, off-screen)
 * Ep.10 - "VIOT Dangers" (alternate)

Trivia

 * One of the heavy inspirations of the Guardian and his gang are The Heavy King and Hard Boiled Heavies from Sonic Mania.
 * He's one of the main inspirations of Vitreous, a villain from the Spyman's Cosmos universe.
 * While Garmatol seems to be the apparent main villain of OkiVerse, The Crystal Guardian is the true villain of the series.