Ezel is an antagonist of Fairy Tail.
Tartaros arc
Ezel gathers with his fellow Nine Demon Gates members at the Tartaros headquarters under their Guild Master's request. As they convene, the group is joined by Kyôka and Silver, both of whom were off on "special missions". Hearing that two of their other members, Jackal and Tempester, are also out, the group move to put their plans against the Magic World into action.
After hearing about Jackal's successful mission involving the destruction of the entire Magic Council, Ezel listens as some of the other Nine Demon Gates members argue over their lack of participation in the plan so far and shouts out that, as a Demon, he has no dignity and that he wants to go massacre humans. During Fairy Tail's assault on Tartaros' HQ, The Magic Pulse Bomb Face was activated by Ezel, earning praise from Franmalth for his swift efforts. Later, as Wendy Marvell arrives to the location of Face in order to stop the weapon from activating, Ezel, unbeknownst to the Dragon Slayer, uses his tentacles to sneak up on her from behind.
Disappointed with his target, Ezel curses Kyôka for assigning him such a task, angry that Wendy will not satiate him. Jumping down at the young girl from the ceiling, Ezel attacks her and as he sees her cast spells on herself, asks if she is an enchanter. Despite her enchantments, Ezel easily withstands her Sky Dragon's Roar and blocks her next attempt. Activating a move of his own, Ezel easily blows the young girl away and goes on the offensive, knocking her around with ease. Pinning her to the ground, Ezel gestures her to look Face as it readies to activate, explaining that it will release Magic-damaging particles known as Ethernano to eliminate Magic around the continent, thus allowing Tartaros' Curses to reign supreme as all Mages are rendered powerless. As he threatens to kill Wendy immediately, Ezel is then jumped by Carla, who attempts to fight him off. Agitated, Ezel grabs the Exceed and proceeds to eat her but before he is able to do so, is blown to the roof of the cave much to his shock as it is revealed that Wendy mixed the air and the Ethernano near Face, thus enabling her to enter Dragon Force.
Shocked to see Wendy enter Dragon Force, Ezel is quickly assaulted with a number of swift blows from the Dragon Slayer, who uses her newly increased speed to her advantage. Being struck upwards into the cave ceiling, Ezel quickly recovers and launches himself at Wendy, but is caught up in a flurry of wind as Wendy casts Shattering Light: Sky Drill. Hurriedly switching into his Slash Attack Mode, Ezel manages to cut his way out of the spell and just avoid receiving any damage, though a persistent Wendy continues to force him back, creating thick streams of air currents that she continuously wraps around Ezel's body. Trying and failing to cut through once more, Ezel is sent flying backwards into Face, smashing through the device and landing unconscious under its fallen form. As he lays unconscious amongst the rubble, Ezel is unable to escape the explosive destruction of Face and is caught in its mighty blast.
Later, Ezel's body begins to reform within Hell's Core. Enraged by his own defeat at the hands of Wendy, he demands that Seilah should revive him. Unable to help him due to her battle with Mirajane Strauss, Ezel's rebirth is stopped when the nearby Fairy Tail Mage destroys the lab.