Skills
Round Shot is one of the first skills you’ll unlock for Mercedes in Odin Sphere Leifthrasir, and it’s actually a pretty good skill that can carry you till the end of her story. The Round Shot allows you to fire a huge magic bullet which pierces through enemies and can stun them. This is great for dealing with mobs, in particular. If enemies happen to get too close to you, simply use Round Shot to push them back.
Spread Shot is another good skill to have. This allows Mercedes to fire repeatedly in a radial pattern. This is a skill that you’ll definitely want for bosses, especially for those with weak points that you can’t reach on the ground. It can also come in handy for mobs as it’ll throw them into the air, opening a window for you to get in some air combos and juggles.
If you like staying in the air with Mercedes, you should also consider investing some points into Brioniac. This lets her fire explosive magic bullets high above to shower the land below. Again, this is another great skill for mobs, but it might not be as effective for fast bosses. Be sure to get Spread Shot and upgrade the skill as often as you can when playing as Mercedes.