Apparently not (Lazula is one of the 6 guest party members). The 22 playable permanent party members are (in alphabetical order): Adder, Ami, Babariccia, Bosche, Brindle, Cid, Coral, Darius, Elina, Godot, Jasmine, Laka, Lyric, xxx (obscured - spoiler), Moguel, Nobumasa, Oalston, Oliver, Ovelia, Siegfried, Vahn, Vera. Please refer to the character recruitment guide on the game page on how to recruit the optional characters if you need help.