Xellos

This enigmatic Mazoku serves as a playful yet sinister trickster, often hiding his true motives behind the mysterious phrase, "That is a secret." While he appears to be a comedic fourth-wall breaker, his true nature as a powerful demon is revealed when his eyes open. Though loyal to Zelas Metallium, he frequently aids Lina Inverse's group, acting as an unpredictable enigma who balances manipulation with unexpected protection.