Lea is the main protagonist of CrossCode and a player of CrossWorlds. She has lost her memory for unknown reasons prior to the beginning of CrossCode, and she was entered into CrossWorlds in an attempt to recover it. A problem with her avatar's speech synchronization has caused her to be effectively mute. Lea's class in CrossWorlds is Spheromancer, a highly-customizable class primarily adaptable to Ball combat.
Lea is a Spheromancer in the CrossWorlds, playing as a way to try and recover her memories. Due to a glitch, her vocabulary is rather limited.
Lea is an enthusiastic and skilled fighter, jumping into combat and proving herself to be very quick to recall the basics of playing CrossWorlds. Likewise, her expressions in conversations highlight that while she's excitable and curious, she's also incredibly awkward and at times bashful.