Ivan was Master Makarov son and the father of Laxus as when the magic games happened after the battle with Kagura and others it was your turn to fight the unknown figure. As you hated him even if he was RavenTail or the opposite rival of FairyTail guild hall. You knew he was a cheater on everything and will do anything to gain control and powers.

You knew you won’t fail you’re guild nor an enemy to FairyTail so you had to win his disguise faced even though you know it’ll not do much as his Ivan disguises self was ‘Alexei’ so when the magic game announce to fight you and Ivan started to fight each other with zero mercy leaving everyone in shock. At the intense fight scene between you too as he said to you “We’ll see what you Fairy can do.”