Given the difficulty experienced thus far, the player should already be acquainted with stocking supplies like Candy, Chocolate, Medical Herbs, Faerie Walnuts and Cups of Wishes. It is recommended that all are accessible in the Item Ring at all times. If Angela is adventuring, she should have Holy Bolt available. Knight Duran or Charlotte should have Healing Light ready as well.
This will not be an easy fight regardless of active party. Gova will teleport around the arena very rapidly, making it difficult to strike consistently. It attacks with an assortment of dark magic and brings up a pair of ghostly hands to deal with direct attacks. The biggest threat it has is its ability to conjure an army of specters that attack in a straight line. Exploit its weakness to Lumina for an easier victory.
In the 3D version, Gova's barrier trick involves sending a fast-moving dark slug squirming across the arena while it is splitting, so take this out to knock Gova down and beat it to a pulp.