Max is basically an alcoholic, has been blackout drunk several times
Doesn't do cigarettes but smokes weed a ton
Also he's a prescription drug abuser, that's his main thing
Overall a lot to work with
Out of a sudden I'm curious to see what OCs smoke and/or drink.
michiko and gesaku smoke cigarettes. michiko drank once and got drunk and never tried drinking again. she is a heavier smoker than ayami and gesaku combined - she smokes like 3-4 cigarettes per day. ayami vapes.
michiko smokes weed, too.
taiki's pretty much a chain smoker for most of his early life and never fully kicks the habit, in spite of his best interests, even with his wife's support; he does manage to cut down massively though for the sake of his family.
josephine, unlike taiki, only smokes in times of great duress. she hates the smell of cigarette smoke and loathes the fact she ever developed a taste for them.
dae developed a drinking problem when she was very young in order to cope with her poor home life. she has her ups and downs. i like to think that one day she gets proper help but its never been rped or anything.
and to put a stop to this pity parade, there's eino who drinks socially but never in excess if he can help it!
Tessa smokes and drinks all the time, but she probably wouldn't so much if it actually had much of an effect on her health. Immortality has it's perks I guess, but it doesn't stop some people from being worried for her. Clara and James both smoke every now and again too, but only because it was so socially common in their time. They were also brought up during prohibition so Clara doesn't drink very often just by habit, but James occasionally helped his father with bootlegging (don't tell the cops, he still tries to keep it a secret even though alcohol's been legal for a year now ;P) and hung around speakeasies. He still has the occasional drink, but he rarely gets drunk.