All of the characters can use any of the weapons. Mana orbs obtained from bosses and various chests around the world allow you to upgrade your weapon, changing their name, appearance and stats. The max weapon level is equal to the amount of orbs that have been used to upgrade it, plus one for the base level.
As weapons are used, the character’s skill with the weapon levels up, allowing them to peform better charge attacks.
Visit the individual weapon pages to learn the weapon’s orb location. The weapons are: