Question: exvius how to unlock ifrit?
Answer: Follow your quest until you unlock Port City Lodin.
Talk to the Fish Seller in the middle of the town to learn about Ifrit first. ... 
Enter Ordol Port, grab all the quest here (must talk to the small boy below the potion vendor) and head to the exit through the top right, you will unlock Inferno Hollow (Ifrit's lair).