Lini is correct. Unlike Eldena, you can get Lini before you complete Antilaws, making him the first availible secret character. How? Enter Cadoan for the first time. The cutscene with Babus appears, but you don't start the Antilaws engagement. Before you leave town, accept and complete the Oasis Frogs mission, to obtain the Hero Gaol. Complete any mission with the Hero Gaol as a mission item, and you can get Lini to join you. The mission to get the Elda's Cup isn't availible until after you beat Antilaws, which will happen the second time you enter the city.