Anime Like Blue Exorcist
Satan fathered twins in the human world, and now one of them is trying to become an exorcist to kill his own father. The chemistry between Rin and Yukio carries you through the early episodes on pure character momentum. The show loses its way once it abandons that premise for filler, but those first arcs prove the core idea had real weight.
SYNOPSIS
Rin Okumura has a problem: he's the illegitimate son of Satan himself, born to a human mother, and his demonic heritage is about to blow his entire life apart. When his guardian is killed and his true nature awakens, Rin learns that two worlds exist side by side. Assiah is the human realm, while Gehenna belongs entirely to demons. Normally these dimensions never touch, but demons can slip through by possessing objects or people in the human world. Satan created Rin as a vessel strong enough to contain his own power, planning to use his son as an anchor to invade Assiah completely. Rin refuses. Instead of accepting his dark destiny, he enrolls at True Cross Academy, a school where exorcists train to fight demons and protect humanity. Now he must hide his identity from classmates and teachers while learning to control the blue flames of his demonic power. Caught between two worlds and rejected by both, Rin searches for a way to forge his own path, proving that bloodline doesn't determine who you become.
