1. Mostly quiet, only talks when he needs to though he isn't terribly shy about talking when he does. Just doesn't see the need to be loud and talkative all the time anymore.
2. Jumpy and skittish except in battle, he returns to the same old Lavi then. Full of confidence and ready to kick some Akuma/Noah ass.
3. Freaks out when he sees feathers, white hair, or Fourteenth; anyone or anything becomes a shield to hide behind, to keep the Noah from getting him again.
4. Sneaks out of his room at night to hide in the corner of the library or the park with a book, they're usually ones on adventure and daring rescues.
5. Kanda and Lenalee are pretty much his sanity, almost normal around them except for being so damn quiet. He hardly ever teases Kanda though he does still do some stupid things, just to show that he's "all right" but he won't ever be.
6. Used to hallucinate and still has nightmares that everyone he knew and loved was killed or turned into Fourteenth. Either that or he'll dream of the Ark scene over and over again, losing Allen again and again.
7. Piano music makes him shut down to an almost comatose state, no matter what the tune is that's playing. Anything played with that instrument reminds him of Fourteenth.
8. Hates the color red and constantly bleaches his hair orange, otherwise he tries to get rid of it. Every other fabric or paint as well within reason.
9. Sometimes forget his current record's name, responding to a few from the past that he's let slip (ie "My name isn't Lavi, it's _name_.") like Deak, Stephen, Erics, and Tristan.
10. Hides himself more and more in his Bookman work, it's safe there. Just watching and not getting attached, that's what broke him in the first place when he watched Allen being consumed.
11. Hasn't given up on Allen. Because he believes in the young Exorcist's strength there's still dim, blind hope somewhere tucked away in his head that they'll get Allen back.
12. Secretly converted to Christianity thinking that maybe if he prayed hard enough that Allen would come back, I mean if God really wanted this world to be saved then he'd give him back. Right?
13. Though he doesn't openly show it Lavi is probably more protective over Kanda than normal, his friend had been hurt. And it wasn't a state that he liked seeing Kanda in, so Lavi wants to try his best and make sure that he won't revisit that state.
14. Has the entire dewy decimal system memorized and can recite the numbers with barely a thought. This is mostly the fault of all the time he spends in the library.
15. Can sing the hymns very well but he's rather shy about his voice, and he can't sing anything else but or anywhere other than the church.