This battle may only occur if you chose to follow Ridley rather than report to the castle, although this fight may be replaced with other characters. It is highly recommended that you have all the skills on your weapon. For example, use a non-elemental weapon like the Rune Sword, which is two-handed. The reason for this is that you will really want the second Volty attack in this battle, and the great thing about the Rune Sword is the ability to petrify enemies while attacking. First, prepare yourself with plenty of healing items. If you do not know where to go, head to the Dark Elf village via the Journey Pig. Have your Volty gauge set at 100 before the fight. If it is not, wander around and kill things. Also, if you are close to leveling up, do so. When you are prepared for the battle, go into the fort and go through the intermission sequence. The duo will attack you at the same time, but Natalie is very difficult. Concentrate all your power on her. Lock-on if you want to be sure not to direct attacks at Leonard. You can also try to petrify Leonard to worry less about your HP dropping. Unload your second Volty attack on Natalie the first chance you get. This will decrease her HP by about 70% to 80%. Then, just block and counterattack. Be careful not to hit more than once, because Natalie will most likely take out like another 180 to 220 HP or more from you while you are doing a combo. Then, just do counterattacks and Volty attacks every time you get 10 Voltys and she will go down fairly easy. You now only need to worry about Leonard, who has about the same amount of HP as Natalie but does not do close to as much damage. The purpose behind this is that Natalie has a Volty attack that does serious damage. It may even be a one-hit kill for a lot of characters. Make sure to use healing items or a heal command before the match ends.