Mercedes is the daughter to fairy queen, and her weapon of choice is the Psypher crossbow. At the start of the game, she acts and behaves like a childish girl, still blissfully unaware of what’s going on in the world. However, when her mother is suddenly wrenched away from her, she has to quickly learn how to become a queen. Not only that, she has to deal with her cousin Melvin, who looks like he might be up to no good.
Mercedes can be a tricky character to get used to because of the crossbow. Each shot uses up your POW, and you’ll have to stay stationary for about a second so that she can reload and fill up the POW meter again. Mercedes also has the power to fly in the air and reach tall ledges. You’ll have to get used to her aerial abilities and crossbow skills in order to use her effectively in Odin Sphere Leifthrasir.
Because she usually needs to keep her distance from her enemies in order to deal damage, I recommend leveling her up as much as you can before each dungeon to improve her overall survivability.