Alma: Many of Alma's inhibitions will be gone. He's an open and honest guy, but he hides that he's a bit unstable and keeps a lid on how violent he is. But I'm haven't decided whether this means he's more likely to act on his negative feelings or be more open about how he tries to curb said feelings (which involves beating up on inanimate objects and himself).
Ava: If someone pisses her off I can't be sure she won't kill them. Snapping someone's neck or slicing their throat is something she just barely keeps from doing as it is. She probably really needs someone to keep her in check. Expect her to be even ruder and snarky than she already is.
Itachi: ...Being a zombie kind of removed what big inhibitions he had, so he'll be unaffected!
Miranda: She'll be more open and a bit more assertive! She still wouldn't mind doing things when her friends ask since they're her friends, but she'll be more willing to express her feelings. She may also be more willing to discuss certain things that have been going on with her, which she tends to keep to herself so as to not be a bother. Which could be a bit of surprising for most of her friends and cast considering what she's been up to. XD
Rapunzel: There may be confessions in this girl's future. AND TO MORE THAN ONE PERSON. Because that's how she rolls.
Richie: Woah boy. Uh. Richie I have to say is probably my most repressed and inhibition driven character. Losing his inhibitions means that he won't feel a need to hide very large parts of himself that he won't even speak of out loud. Like the fact he's gay. And so he just might hit on a hot guy since he won't really...think about keeping whether he finds a guy cute or not to himself.
Seiji: Seiji was raised to be very formal and keep a polite distance, so he may be more...friendly? Physically affectionate? Pats on the shoulder and little joking jibes. Most of this is so ingrained though he won't be affected as much as some of my others.