Ivan Dreyar is an antagonist of the Fairy Tail series.
Synopsis
Battle of Fairy Tail arc
It's revealed Ivan is using Gajeel Redfox as an informant to gain info about Fairy Tail, Ivan then contacts Gajeel via shikigami and is informed about Fairy Tail's search for Laxus. Ivan then orders Gajeel to remain patient in his quest for vengeance against Natsu Dragneel until they've defeated Laxus and praises him for successfully spying on Fairy Tail. However, Gajeel is actually working for Makarov as a double-agent for Fairy Tail and is actually spying on Raven Tail.
Grand Magic Games arc
Hearing about the members of Fairy Tail returning after seven years, Ivan declares the time has come to defeat them in the Grand Magic Games; with his elite Mages accompanying him to the contest to destroy them. During the end of the preliminaries, "Ivan" is seen watching with the crowd as Team Raven Tail is announced as the third team to make it to the main events of the Grand Magic Games; stating he has been waiting for the chance to be able to face his father and becoming amused when Laxus is announced as one of the members of Team Fairy Tail B. Ivan, disguised as Alexei, approaches Team Fairy Tail A and informs them that Obra attacking Wendy was "a way to say hello".
Alexei chooses Nullpudding to compete in the first event and has him focus on attacking only Gray Fullbuster rather than trying to win. He later has Obra intervene in the match between Flare Corona and Lucy Heartfilia, erasing her Magic Power and allowing Flare to win their battle. However, on the second day, Flare is shown to be badly wounded after being punished by "Alexei" for her "pathetic display" during their match.
On the third day, Alexei orders Obra to compete in the Pandemonium event, but advises him to not show his true power because of the presence of an official from the Magic Council. At the end of the event, Nullpudding hands him the list of Mages that will battle on that day. He states that the administration of the Games is being very creative and tells his guildmates that they should start with their real objective.
During Alexei's matchup with Laxus, he creates an illusion of the two fighting, which appears to show Laxus losing the fight. Alexei reveals this to Laxus and explains he wishes to talk to him where the judges and audience are unable to see. Alexei removes his mask and reveals himself to be the real Ivan Dreyar, while the one in the crowd is just a Thought Projection. Ivan requests that his son tell him the location of Lumen Histoire in exchange to manipulate the illusion to have Laxus win the match, though Laxus denies knowing anything about it. When Laxus refuses his offer and declares he'll win without his help, Ivan has the rest of Team Raven Tail reveal themselves to fight him.
Ivan reveals that Raven Tail is an anti-Fairy Tail guild with members who have specialized techniques to match Fairy Tail's weaknesses. However, he is shocked to learn from Laxus that Fairy Tail has already known about his guild and it's members for a long time due to Makarov thoroughly investigating him, realizing that Gajeel was actually a spy. Laxus explains that Makarov never made a move against Raven Tail because deep down he still had faith in his son. Enraged, Ivan furiously attacks Laxus with a torrent of shikigami and demands he tell him about Lumen Histoire, but Laxus blocks the attack and remains unscathed.
He then sends out his members to attack him, only to watch in shock as Laxus easily defeats his elite team one by one. When Laxus begins to approach him next, Ivan begs his son not to hurt him, reminding him that they are family. However, Laxus tells him that Fairy Tail is his family and he'll offer no mercy to those who threaten them. He then defeats Ivan in one powerful punch, destroying the illusory barrier and revealing his deception to the judges and audience. Before he is taken away by the Custody Enforcement Unit, Ivan ominously tells Laxus that Lumen Histoire is Fairy Tail's dark secret.