You bet D-squall! There is some random sailor in Dhierce who says he saw a mage blowing things up in the ruined town of Thimpote. So, let's go to Thimpote
Leave Dhierce and head south, back towards Arhaeldem. Head West from there and there is a ruined town (surrounded by dead-looking trees), go inside there and there is a maze, work your way through the maze and talk to a girl wearing a bunny suit everytime you see her (she is always next to treasure chests). After you try talking to her 5 times, she runs away into the pub. Follow her into the pub, there is a cutscene and she tells you to follow her, do so. Talk to her once again, she gives you a key to enter the school (save your game), and then head inside the school. There will be a boss battle and some story and then she joins your party. Now you have a mage in your party!
And there's a mini-walkthrough which can take you through the rest of the game here, if you need it:
viewtopic.php?f=36&t=3212&start=75Hope you're enjoying it