Play as Breillat
On the beginners cruise at the very start of the game, go inside the bar. Talk to Breillat the bartender ten times. After the ten times, she will say how her job is boring and ask to switch identities. Say "Yes" and you will have her as your character.
Chocolate ice cream
Play the two games in the bar where Breillat is found to get two vouchers. Give them to her to get a chocolate ice cream, which restores 100 HP and 100 SP.